Not true. He was raised Catholic by his mom, but turned to atheism and occult worship in his twenties in Vienna.
I’ve seen all that, and do agree he had occult tendencies.
But Hitler was baptized, confirmed, and even regularly attended the Catholic Church Church as an adult. He buried his mother as a Catholic and had numerous Catholic ceremonies and blessings of other Nazis by various priests.
Was he sincere Catholic? Of course not.
I think he used the trappings of the Church (and of Christianity overall) to give a sheen of respectability to his evil deeds, just like he used everyone and everything else.
Hence why I said “nominal Catholic.”