The conservative mainstream still calls the president's religious beliefs into question, but they stop just short of accusing him of apostasy and concealment. What they consider safe is the assertion that Obama is acting as if he were Muslim.
Somewhere between the comical and the incredulous, the GOP has simply channeled its inner hatred. There is, literally, nothing they will give Obama credit for and a whole host of fictive evils the responsibility for which they regularly lay at his feet.
Two years ago, had Obama directed the anger of Main Street at, to quote TR, the "malefactors of great wealth," it's quite possible that he could have cornered the market on populism then. But he didn't.