WASHINGTON -- A former Department of Homeland security analyst who left the government after conservatives pummeled his report warning of right-wing extremism's growing threat said that the weekend attack on a Sikh temple in Wisconsin didn't surprise him because "politics and personalities" stymie investigators from targeting non-Islamic militants.

"There are certain people in charge who made a decision and they stuck by that decision," said Daryl Johnson, who left DHS two years ago to form his own consulting company. "It's come at a cost and that’s the bottom line. Lives have been lost. Attacks continue to happen."

The latest attack, which left six people dead Sunday, was allegedly carried out by a racist skinhead named Wade Michael Page, who was killed by police. Tracked for more than a decade by the Southern Poverty Law Center, the Army veteran was reportedly "looked at" by federal investigators, who apparently didn't follow through.

"Hindsight is always 20-20, but if DHS had a domestic terrorism unit today, we would definitely have sent out a warning, a threat assessment (to) Muslim-Americans being attacked. I know this was a Sikh temple, but he mistook them for Muslims," Johnson told The Huffington Post in an interview. Despite repeated reports of arson and other violence against mosques, "not a single intelligence report has warned these communities. ... Someone's not connecting the dots," Johnson said.

Saying, "I hate to be right under these circumstances," Johnson had warned in a 2009 DHS report about the growing threat of right-wing extremists. He said many would be motivated to become violent by the election of the first black U.S. president and an ailing economy. He also said right-wing extremist groups viewed military veterans as "lucrative recruits." It's unclear when Page, an Army veteran, became radicalized.

Johnson's report was blasted by conservatives, including Newt Gingrich, who insist only Muslim extremism poses an existential threat to the nation.

Pummeled from the right, DHS Secretary Janet Napolitano withdrew Johnson's report and soon slashed the number of analysts devoted to domestic, non-Islamic terrorism. Today, said Johnson, just one DHS analyst is assigned full time to track neo-Nazis like Page as well as violent anti-abortion activists and militant environmental and animal-rights groups.

"That just baffles my mind," said Johnson, whose book “Right Wing Resurgence: How a Domestic Terror Threat Is Being Ignored” will be published in September. "Why hasn’t DHS increased its capabilities to analyze and assess these groups?"

While Rep. Peter King (R-N.Y.), chairman of the House Homeland Security Committee, has held a series of hearings on Muslim radicalization -- including inside the military -- Johnson noted that no one on Capitol Hill has given equal time to right-wing extremism.

"Why haven’t we had any hearings on the white supremacist threat? I think it boils down to the fact that our legislators are basically biased in what they think the threat is," Johnson said. "I think they need to be more equitable."

Before Sunday's shooting at the Sikh temple, right-wing terrorists had killed nine people in eight attacks in the U.S. since 9/11, according to the New America Foundation, a non-partisan think tank. As Peter Bergen, who co-authored the foundation's study on homegrown terrorism, noted, that toll appears likely to rise to 15 given Wade Michael Page's white supremacist ties.

In contrast, terrorists inspired by al Qaeda or other Muslim extremist ideology have carried out four attacks on U.S. soil since 2001 that resulted in 17 deaths -- all but four of them at Fort Hood in 2009.

HuffPost's request for comment from DHS was not returned, but agency officials have denied Johnson's depiction of a department asleep at the wheel when it comes to violent extremists who don't fit the al Qaeda mold.

But Johnson said denial is bipartisan, with Republicans in Congress and Democrats in the White House failing to take right-wing extremism as seriously as they take Islamic militancy.

"The best word that could describe it is probably defiant. Resolute," Johnson said of the federal government's attitude. "There’s pretty much a 'We made a decision, we’re sticking with that decision no matter what happens, because if we reverse position we’ll look worse' attitude."

Also on HuffPost:

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  • Wisconsin Shooting

    A man reacts outside the Sikh Temple of Wisconsin in Oak Creek, Wis. where a shooting took place on Sunday, Aug. 5, 2012.

  • Wisconsin Shooting

    Bystanders look on as SWAT officers surround the Sikh Temple of Wisconsin where at least one gunman stormed a mass and opened fire August, 5, 2012 Oak Creek, Wisconsin.

  • Wisconsin Shooting

    Police SWAT officers surround the Sikh Temple of Wisconsin where at least one gunman stormed the mass and opened fire August, 5, 2012 Oak Creek, Wisconsin.

  • Wisconsin Shooting

    A police officer surrounds the Sikh Temple of Wisconsin where at least one gunman stormed the mass and opened fire August, 5, 2012 Oak Creek, Wisconsin.

  • Wisconsin Shooting

    Bystanders are directed by police officers as SWAT officers surround the Sikh Temple of Wisconsin where at least one gunman stormed a mass and opened fire August, 5, 2012 Oak Creek, Wisconsin.

  • Wisconsin Shooting

    Police stand guard as bystanders watch at the scene of a shooting inside a Sikh temple in Oak Creek, Wis., Sunday, Aug. 5, 2012. Police and witnesses describe a chaotic situation with an unknown number of victims, suspects and possible hostages.

  • Wisconsin Shooting

    Bystanders stand outside the scene of a shooting inside The Sikh Temple in Oak Creek, Wis, Sunday, Aug. 5, 2012.

  • Wisconsin Shooting

    Police SWAT officers surround the Sikh Temple of Wisconsin where at least one gunman stormed the mass and opened fire August, 5, 2012 Oak Creek, Wisconsin. At least six people were killed when a shooter, who was shot dead by a police officer, opened fire on congregants in the Milwaukee suburb.

  • Wisconsin Shooting

    Map locates Oak Creek, Wis., site of shooting at Sikh temple.

  • Wisconsin Shooting

    A woman reacts with others as they await word on a shooting at a Sikh temple in Oak Creek, Wis., Sunday, Aug. 5, 2012, where police and witnesses describe a chaotic situation with an unknown number of victims, suspects and possible hostages.

  • Wisconsin Shooting

    Bystanders sit in the shade at the scene of a shooting inside The Sikh Temple in Oak Creek, Wis, Sunday, Aug 5, 2012. Greenfield Police Chief Bradley Wentlandt says tactical officers have been through the temple where shots were fired about 10:30 a.m. Sunday. He says they found four people inside the building and three people outside.

  • Wisconsin Shooting

    Bystanders looks on as SWAT officers surround the Sikh Temple of Wisconsin where at least one gunman stormed a mass and opened fire August, 5, 2012 Oak Creek, Wisconsin. At least six people were killed when a shooter, who was shot dead by a police officer, opened fire on congregants in the Milwaukee suburb.

  • Wisconsin Shooting

    Bystanders looks on as SWAT officers surround the Sikh Temple of Wisconsin where at least one gunman stormed a mass and opened fire August, 5, 2012 Oak Creek, Wisconsin.

  • Wisconsin Shooting

    Armed police investigate the Sikh Temple in Oak Creek, Wis. where a shooting took place on Sunday, Aug. 5, 2012.

  • Wisconsin Shooting

    Bystanders looks on as SWAT officers surround the Sikh Temple of Wisconsin where at least one gunman stormed a mass and opened fire August, 5, 2012 Oak Creek, Wisconsin.

  • Wisconsin Shooting

    A bystander looks on as SWAT officers surround the Sikh Temple of Wisconsin where at least one gunman stormed a mass and opened fire August, 5, 2012 Oak Creek, Wisconsin.

  • Wisconsin Shooting

    A woman talks on her phone outside The Sikh Temple in Oak Creek, Wis., where a shooting took place Sunday, Aug. 5, 2012.

  • Wisconsin Shooting

    Police personnel move outside the Sikh Temple in Oak Creek, Wis, where a shooting took place Sunday, Aug. 5, 2012.

  • Wisconsin Shooting

    People watch police personnel outside the Sikh Temple in Oak Creek, Wis., where a shooting took place Sunday, Aug 5, 2012.

  • Wisconsin Shooting

    Police personnel move outside the Sikh Temple in Oak Creek, Wis., where a shooting took place Sunday, Aug 5, 2012.

  • Wisconsin Shooting

    Police personnel move outside the Sikh Temple in Oak Creek, Wis., where a shooting took place Sunday, Aug 5, 2012.

  • Wisconsin Shooting

    A police officer talks with bystanders outside the Sikh Temple of Wisconsin where at least one gunman fired upon people at a service August, 5, 2012 Oak Creek, Wisconsin.

  • Wisconsin Shooting

    Various police personnel look into a parked vehicle outside the Sikh Temple of Wisconsin where at least one gunman fired upon people at a service August, 5, 2012 Oak Creek, Wisconsin. At least six people were killed when a shooter, who was later shot dead by a police officer, opened fire on congregants in the Milwaukee suburb.

  • Wisconsin Shooting

    A man wipes away tears outside the Sikh Temple in Oak Creek, Wis. where a shooting took place on Sunday, Aug 5, 2012.

  • Wisconsin Shooting

    A tactical officer walks past the Sikh Temple of Wisconsin where at least one gunman fired upon people at a service August, 5, 2012 Oak Creek, Wisconsin.

  • Wisconsin Shooting

    Women walk with a red cross worker outside the Sikh Temple in Oak Creek, Wi, where a shooting took place Sunday, Aug 5, 2012.

  • Wisconsin Shooting

    People mill around in front of the Sikh Temple of Wisconsin where at least one gunman fired upon people at a service August, 5, 2012 Oak Creek, Wisconsin.

  • Wisconsin Shooting

    An ambulance drives down Howell Ave as SWAT officers surround the Sikh Temple of Wisconsin where at least one gunman fired upon people at a service August, 5, 2012.

  • Wisconsin Shooting

    A tactical officer runs to position as SWAT officers surround the Sikh Temple of Wisconsin where at least one gunman fired upon people at a service on August, 5, 2012.

  • Wisconsin Shooting

    SWAT officers surround the Sikh Temple of Wisconsin where at least one gunman fired upon people at a service August, 5, 2012 Oak Creek, Wisconsin.

  • Wisconsin Shooting

    People look on in front of the Sikh Temple of Wisconsin where at least one gunman fired upon people at a service August, 5, 2012 Oak Creek, Wisconsin.

  • Wisconsin Shooting

    People wait for word on family and friends in front of the Sikh Temple of Wisconsin where at least one gunman fired upon people at a service August, 5, 2012 Oak Creek, Wisconsin.

  • Wisconsin Shooting

    Police guard the front of the Sikh Temple of Wisconsin where at least one gunman fired upon people at a service August, 5, 2012 Oak Creek, Wisconsin.

  • Wisconsin Shooting

    Police guard the front of the Sikh Temple of Wisconsin where at least one gunman fired upon people at a service August, 5, 2012 Oak Creek, Wisconsin.

  • Wisconsin Shooting

    People mill around in front of the Sikh Temple of Wisconsin where at least one gunman fired upon people at a service August, 5, 2012 Oak Creek, Wisconsin.

  • Wisconsin Shooting

    A police officer guards an area in front of the Sikh Temple of Wisconsin where at least one gunman fired upon people at a service August, 5, 2012 Oak Creek, Wisconsin.

  • Wisconsin Shooting

    A woman uses a phone as people react outside the Sikh Temple of Wisconsin in Oak Creek, Wi, where a shooting took place Sunday, Aug 5, 2012.