Although there is no shortage of quotations from Nazi sources that demonstrate its evil, people occasionally invent quotations that sound like what they think the Nazis would say to support a point. I have a page on false Nazi quotations that looks into such matters.
Today I’m adding a quotation found in more than 1,700,000 web pages and a fair number of books. Hitler is alleged to have said: “What luck for rulers that men do not think.” I’m not absolutely certain is it a fabrication, but I’m almost sure. It isn’t in Mein Kampf, nor the published edition of Hitler’s speeches. No one I can find who cites it provide a source. One book cited by several others provides the quotation, but no source.
But it sounds like what people think Hitler would have said, so it keeps spreading.