Was Hitler an Atheist?

No!

Although Pope Benedict XVI, a former member of the Hitler Youth and was a member of the German Army during the Third Reich, had the temerity to blame the Holocaust on a “Godless regime,” Adolph Hitler was a Roman Catholic. He wrote in 1941 that he was always and would remain a Catholic and in Mein Kampf, he wrote “. . . therefore, I am convinced that I am acting as the agent of our Creator. By fighting off the Jews, I am doing the Lord's work.”

During the Third Reich, the Catholic Church did nothing about the Holocaust and after the war, helped many former Nazis to escape to South America on Vatican offical passports.

You will see many uninformed comments here that the Holocaust was caused by atheists and that Hitler was an atheist. This is a lie. Nazism was mainly pro-Christian, Hitler was a Catholic, and killing Jews was promoted from Christians throughout history from John Chrysostom to Martin Luther to Adolph Hitler.

Here are specific quotes from Hitler on this subject:

"The Catholic Church considered the Jews pestilent for fifteen hundred years, put them in ghettos, etc, because it recognized the Jews for what they were. … I recognize the representatives of this race as pestilent for the state and for the church and perhaps I am thereby doing Christianity a great service by pushing them out of schools and public functions." – Hitler, 26 April 1933

"And the founder of Christianity made no secret indeed of his estimation of the Jewish people. When He found it necessary, He drove those enemies of the human race out of the Temple of God." -- Mein Kampf (1925), Vol. 1, p. 174

Don't listen to any nonsense about Hitler being an atheist, or the Holocaust not being motivated by Christian dogma.

And What About Stalin?

Ok. So you found one non-religious bad guy. Woopteado! He is just the exception that proves the rule. But one thing to remember is that when he was a youth, he was geting ready for the priesthood.