Hitler's government established "state churches" by co-opting the leadership of various German churches, definitely including Protestant denominations. I honestly don't know if Catholic parishes were included in this particular Nazi-fication effort. (I only know about the Prods from reading about the heroic Lutheran theologian Dietrich Bonhoffer, who was hung for conspiring to asssinate Der Fuhrer.)

Hitler's actual religion, or at least the one that he made every effort to establish, was a sort of quasi-pagan cult of Aryanism. The public rites (Nazi rallies) were very well planned and designed, and were very effective in acquiring believers.