I am currently reading William L Shirer’s classic book, The Rise and Fall of the Third Reich (1960 ed.). Shirer makes it clear that Adolf Hitler wanted the churches in Germany to submit to his authority…

So far as the Protestants were concerned, Hitler was insistent that if the Nazi “German Christians” could not bring the evangelical churches into line under Reich Bishop Mueller then the government itself would have to take over the direction of the churches. He had a certain contempt for the Protestants (328-329).