I've seen many argue that he was an atheist, agnostic, neopagan in the vein of Himmler, saw himself as a deity, was an extremist Christian, etc. What do we actually know on his views on religions, and if he practiced any himself, sincerely or not?
There's an entire section of the FAQ dedicated to Hitler's views on religion and philosophy which includes an answer to precisely this question by u/commiespaceinvader.
Pleasant reading!