Dinesh D’Souza addresses this in his new movie out this weekend - “Death of a Nation”.
The gist is that Hitler gave lip service to Christianity publicly for political reasons, while privately he criticized it, and planned to do away with it. “Everything within the State, Nothing outside the State” was a Fascist maxim.
When Hitler’s power was consolidated, he did significantly undermine churches, seize properties and imprison clergy. He cracked down hard on Judasim, but Christianity was further down on his hit list. He never did get around to completing his whole program.
By the way, Dinesh D’Souza’s movies are always informative, and this one was too. He is getting better at making movies, with each succeeding one.
Nazism was to be a religious state combination just like islam.