Hitler claimed to be a Christian all his life. He may not have meant it, of course, but it was the faith he grew up in. And as a Christian myself, his faith really doesn't matter one way or the other. The Holocaust didn't happen because its perpetrators were or were not religious. It happened because human beings have an astounding capacity to dehumanize others, and because he offered a nation who felt like the world was against them a cheap scapegoat. It didn't matter how or if he prayed. It was evil, and no sane person condones it.