To call Hitler a Catholic is about as logical as a square circle.
A few quotes from Hitler's Mein Kampf ("my struggle", the book that launched his political career and set out his political and philosophical testament):
"The root of the whole evil lay, particularly in Schoenerer's opinion, in the fact that the directing body of the Catholic Church was not in Germany, and that for this very reason alone it was hostile to the interests of our nationality".
"The attitude of the Pan-German movement toward the Catholic Church was determined far less by its position on science, etc., than by its inadequacy in the championing of German rights and, conversely, its continued aid and comfort to Slavic arrogance and greed".
"Thus, the first theoretical foundation for a struggle of the Pan-German movement against Catholicism..."
"In my study of the Pan-German movement and its struggle against Rome...the struggle against the Catholic Church..."
[Vol 1/Ch 3]
"...above all the [Catholic] House of Habsburg was destined to be the misfortune of the German nation".
Hitler's Table Talk (sayings written down by his secretary, verified and published at the time) is even more explicit. A few excerpts:
"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!"
"Christianity is a prototype of Bolshevism: the mobilisation by the Jew of the masses of slaves with the object of undermining society. Thus one understands that the healthy elements of the Roman world were proof against this doctrine."
"With what clairvoyance the authors of the eighteenth, and especially those of the past, century criticised Christianity and passed judgement on the evolution of the Churches!"
"But 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".
"Kerrl, with the 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 the Christian doctrine into facts. It leads quite simply to the annihilation of mankind. It is merely whole-hearted Bolshevism, under a tinsel of metaphysics."
"Our epoch will certainly see the end of the disease of Christianity. It will last another hundred years, two hundred years perhaps."
"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. Bolshevism practises a lie of the same nature, when it claims to bring liberty to men, whereas in reality it seeks only to enslave them. In the ancient world, the relations between men and pagan gods were founded on an instinctive respect. It was a world enlightened by the idea of tolerance. Christianity was the first creed in the world to exterminate its adversaries in the name of love. Its key-note is intolerance. Without Christianity, we should not have had Islam. The Roman Empire, under Germanic influence, would have developed in the direction of world-domination, and humanity would not have extinguished fifteen centuries of civilisation at a single stroke. Let it not be said that Christianity brought man the life of the soul..."
"Christianity is a rebellion against natural law, a protest against nature. Taken to its logical extreme, Christianity would mean the systematic cultivation of the human failure".
"So it's not opportune to hurl ourselves now into a struggle with the Churches. A slow death has something comforting about it. The dogma of Christianity gets worn away before the advances of science. Religion will have to make more and more concessions. Gradually the myths crumble. All that's left is to prove that in nature there is no frontier between the organic and the inorganic. When understanding of the universe has become widespread, when the majority of men know that the stars are not sources of light but worlds, perhaps inhabited worlds like ours, then the Christian doctrine will be convicted of absurdity".
"Christianity, of course, has reached the peak of absurdity in this respect. And that's why one day its structure will collapse. Science has already impregnated humanity. Consequently, the more Christianity clings to its dogmas, the quicker it will decline".
Enough? I could go on.
Notice, too, how Hitler uses all the same tired, old arguments that atheists continue to regurgitate today. Same old nonsense coming back century after century.
According to historian Michael Rissmann, young Hitler was influenced in school by Pan-Germanism and began to reject the Church, receiving Confirmation only unwillingly. A boyhood friend reports that after Hitler had left home, he never attended Mass or received the Sacraments again.
Georg Ritter von Schönerer's writings and the written legacy of his Pan-German Away from Rome! movement, which agitated against the Roman Catholic Church at the end of the 19th century, heavily influenced the young Hitler.
It is not just atheists who make the same old mistakes. However, the lesson of history is that atheists who mass-murder millions often don't think they are making mistakes. Often enough they think they are doing the right thing.
Certainly Hitler, Stalin, Mao and Pol Pot did.
And that's just one of the many problems with atheists and heathens.