Anything that leads to murder should raise doubts about its legitimacy when put in service of so-called spiritual truth. That killing was done "for God" and yet didn't lead to a complete re-think about the theological "approach" to a relationship with God is simply insane.
Conservatives like Douthat, who pine for a mythical version of a church-centered postwar world, might lament that, but I say thank God for heretics. They broaden our minds and deepen our spirits.
When I use the word God, I have absolutely no idea what I'm talking about. And yet, paradoxically, I've staked everything there -- with this Mystery that I cannot comprehend with my finite mind.