The Concordat brought Hitler to power in Germany? As if the Vatican had to power to make by treaty Hitler the dictator of Germany. Germany was two-thirds Protestant.
45% of Germany was Catholic --- and of course Hitler, Goering, Himmler, and many others in the high command were "sons of the Catholic Church", as Generalissimo Franco put it, none of whom were ever excommunicated for their unChristianlike activities.