Even if Hitler had to pretend to be a Christian to get people behind his program against the Jews (and it was a public program, as Mein Kampf makes clear, and of course the fact that thousands of Germans happily carried it out), then the idea that atheism caused the holocaust is clearly refuted. [via email]
So if a man was not really a Christian and he lead thousands away from following Christian principles, then how can Christianity be at fault for the Holocaust? Hmmm. Does the Bible explain what happened? Yes it does.
For the time will come when people will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear. - 2 Timothy 4:3
Even if Hitler was not an atheist he sure was not a Christian.
Debunking Christianity: Quote of the Day on Hitler, by Richard Carrier