I've read Mein Kampf (God was it a painful read, too), Trevor-Roper's Hitler's Table Talk and Toland and Fest's biographies of Hitler. From these and many other sources it is clear that Hitler despised Christianity almost as much as Judaism and tolerated it ONLY because it was the traditional religion of the German masses. For that reason he sometimes used religious language in his speeches, especially when he appeared before very conservative audiences or when he was speaking in Catholic Bavaria outside of Munich. Hitler was himself agnostic to the point of simply not caring, having utterly rejected Catholicism in his youth. Per Trevor-Roper, his eventual goal was to destroy the church and replace it with an entirely synthetic cult focused on Blood, Soil, the State and the Leader. Such a controversial change had to wait for the present generation of Germans to die out, but in this goal Hitler was pragmatic and patient. But you can see the shape of what was to come in the madcap quasi-pagan rituals of the SS leaders.
Germany was a Catholic country, so obviously there were “Christian” Nazis. But it had NOTHING to do with Christianity. It’s the same as blaming Timothy McVeigh being a “Christian” as a reason behind his bombing. McVeigh may have been raised in a traditional Christian home, but he was a committed atheist. Unlike the Nazis who DID have that pagan statist “religion” based on the “worship” of a charismatic leader. Like Castro, Chavez, Mao, and Stalin.