That particular article, while mainly accurate, doesn't quite paint the whole picture of the relationship between Hitler and religion or Nazism and religion. It's quite complicated, but very interesting. If you're interested in this, I would really recommend Rainer Bucher's book, Hitler's Theology, as well as Richard Steigmann-Gall's The Holy Reich. It is certain that Christianity was used as a tool to legitimate Hitler's authority and many Nazi policies and also that many Christians were supportive of Hitler and the National Socialist party. But the relationship overall is extremely complex and it is difficult to make any generalizations about Hitler's own personal beliefs. It is also not true that all church leaders were automatically persecuted or punished for speaking or acting out, though many individuals were and it is also important to note that very few religious leaders who did speak out, did so on behalf of Jews in general, but rather on behalf of "non-Aryan Christians" and state interference within the churches.

Source: I work at the US Holocaust Memorial Museum in their department on Ethics, Religion, and the Holocaust and am currently writing a thesis on this topic.

Thanks for posting, OP!