It is interesting that the allegedly devout Catholic Hitler would praise the Protestant Martin Luther.Then again, humans are inconsistent. Many atheists (i.e.: Christopher Hitchens) like to cite Thomas Paine when supporting atheism or anti-theism, even though Paine was not an atheist, but a deist. He may not have agreed with Christians, but he did not agree with Atheists either.
For a thorough analysis of this question, see my http://CatholicArrogance.Org/Hitlersfaith.html .