Honestly, this is mainly a posting that I’m writing so that I can later point to it, because somehow Christians often try to play the „Atheism must be bad, because Hitler was an atheist“ card, an argument sometimes called Reductio ad Hitlerum. Guess what: He was catholic. He was a Christian. There is no denying that, as he wrote into his heinous „Mein Kampf“, that he did what he did because he believed to do god’s will. So, dear believers, mentioning Hitler is effectively shooting your own leg of. So, don’t.
Sometimes, people (ok, Christians) want to cherry-pick, telling me that Adolf Hitler was no „true“ Christian. Sorry, you don’t get to use that „Get out of Jail free“ card, see the „no true Scotsman“ fallacy. Or, for example, someone wanted to explain that as Hitler was member of the Thule Society (a claim that’s not even proven, it’s not really sure how much Hitler had to do with them) and could not have been Christian. Bad luck here, he still was. He could have been a member of stamp collectors anonymous and still be a Christian. You don’t get to decide who is a Christian, simple as that. If someone was baptized, claimed to be a Christian and was accepted as a Christian by the church, he is Christian. End of Story.
Ok, now I got this out of my system, I want to add something more positive: I do not think that Hitler did what he did because he was Christian. He was a crazy sociopath, no doubt about that, and people like him need no reason, only sometimes an excuse. Someone like Hitler would probably have found a way to be horrible even if he was an Jainist. The only thing we can learn from this is, that religion is no guarantee to make someone a good person. People can be bad and people can be good – religion doesn’t change that.
(But, of course, a little detail: More than 1000 years of church sanctioned hatred of Jews in europa surely did prepare the way for the horrible things that happened in the 3rd Reich. Even Lutherans have to be ashamed here, as Luther himself was a strict anti-semit, demanding that all synagogues and Jewish houses should be burned.)
Atomic Wasteland 
“Secular schools can never be tolerated because such a school has no religious instruction and a general moral instruction without a religious foundation is built on air; consequently, all character training and religion must be derived from faith…. We need believing people.”
-Adolf Hitler, April 26, 1933
Sorry that’s just wrong,
You really need to read a book called Hitler’s secret conversations which is a collections of a lot of Hitlers letters gathered after the war to show what he was like when he spoke not to the public.
There is only a tiny portion of it that deals with christianity but in his letters you can find quotes like these:
Night of 11th-12th July, 1941:
National Socialism and religion cannot exist together…. The heaviest blow that ever struck humanity was the coming of Christianity. Bolshevism is Christianity’s illegitimate child. Both are inventions of the Jew. The deliberate lie in the matter of religion was introduced into the world by Christianity…. Let it not be said that Christianity brought man the life of the soul, for that evolution was in the natural order of things. (p 6 & 7)
14th October, 1941, midday:
The best thing is to let Christianity die a natural death…. When understanding of the universe has become widespread… Christian doctrine will be convicted of absurdity…. Christianity has reached the peak of absurdity…. And that’s why someday its structure will collapse…. …the only way to get rid of Christianity is to allow it to die little by little…. Christianity the liar…. We’ll see to it that the Churches cannot spread abroad teachings in conflict with the interests of the State. (p 49-52)
19th October, 1941, night:
The reason why the ancient world was so pure, light and serene was that it knew nothing of the two great scourges: the pox and Christianity.
21st October, 1941, midday:
Originally, Christianity was merely an incarnation of Bolshevism, the destroyer…. The decisive falsification of Jesus‘ doctrine was the work of St.Paul. He gave himself to this work… for the purposes of personal exploitation…. Didn’t the world see, carried on right into the Middle Ages, the same old system of martyrs, tortures, faggots? Of old, it was in the name of Christianity. Today, it’s in the name of Bolshevism. Yesterday the instigator was Saul: the instigator today, Mardochai. Saul was changed into St.Paul, and Mardochai into Karl Marx. By exterminating this pest, we shall do humanity a service of which our soldiers can have no idea. (p 63-65)
13th December, 1941, midnight:
Christianity is an invention of sick brains: one could imagine nothing more senseless, nor any more indecent way of turning the idea of the Godhead into a mockery…. …. When all is said, we have no reason to wish that the Italians and Spaniards should free themselves from the drug of Christianity. Let’s be the only people who are immunised against the disease. (p 118 & 119)
14th December, 1941, midday:
Kerrl, with noblest of intentions, wanted to attempt a synthesis between National Socialism and Christianity. I don’t believe the thing’s possible, and I see the obstacle in Christianity itself…. Pure Christianity– the Christianity of the catacombs– is concerned with translating Christian doctrine into facts. It leads quite simply to the annihilation of mankind. It is merely whole-hearted Bolshevism, under a tinsel of metaphysics. (p 119 & 120)
27th February, 1942, midday:
It would always be disagreeable for me to go down to posterity as a man who made concessions in this field. I realize that man, in his imperfection, can commit innumerable errors– but to devote myself deliberately to errors, that is something I cannot do. I shall never come personally to terms with the Christian lie. Our epoch Uin the next 200 years will certainly see the end of the disease of Christianity…. My regret will have been that I couldn’t… behold .“ (p 278)
It’s safe to say that he was not a Christian, his mother was a catholic but as for himself it’s clear to me that he was not a christian, and you can’t find any hint at all from his writings that he was of any religion but rather an atheist with Ideologies that seem to have been inspired from some sort of sick twist from Darwinism.
„Ok, now I got this out of my system, I want to add something more positive: I do not think that Hitler did what he did because he was Christian. He was a crazy sociopath, no doubt about that, and people like him need no reason, only sometimes an excuse. Someone like Hitler would probably have found a way to be horrible even if he was an Jainist. The only thing we can learn from this is, that religion is no guarantee to make someone a good person. People can be bad and people can be good – religion doesn’t change that.“
Well said. I used to make the mistake that all those who claimed to be Christian were sociopaths, but I have since learned that this is not always the case. I also cannot take everyone’s word that they are a Christian, Jainist, or stamp collector.