In what sense did Hitler "use" Roman Catholicism?
You have a habit of believing what you want to believe, and seeing only that which you feel supports you while waving away all else with "that proves nothing". I will not waste my time providing you more information to ignore. But for those who believe in learning:
"Postwar Christian apologists have put perhaps their greatest efforts into creating the myth that Adolf Hitler was not a Christian. An entire cottage industry seems to have sprung up around the desire to perpetuate this myth, and while its motivations are perfectly understandable (who would want to be associated with Hitler in any way?), its dishonesty is unjustifiable. The truth, however uncomfortable, is still the truth."