More details? I was quoting a contemporary British propaganda poster; and was unaware of the quote as being connected to any research on Hitler, controversial or otherwise.
The quote comes from
Hermann Rauschning, and the Wiki link there seems relatively unbiased, if brief. There's mention of the controversy surrounding some of his work there. I found other references on Rauschning from Google, but I'm not sure I want to take the time to sort out the genuine skeptics of his work from the foaming-at-the-mouth historical revisionists who want to deny the Holocaust entirely.
Oh yes, and you also have Hitler's eulogy upon Hindenberg, ending with "...enter thou upon Valhalla" ; which is quite a strange remark for a Bible-believer to make at a funeral. Still more so for them to have made it in the early 1900's when PDF's (public displays of faith, not the Adobe file) were not frowned upon.
Will have to see--if I ever find the time--if there are other sources for the quote about "either a German or a Christian."
Cheers!