Certainly there are less infamous sources, but once I found it, it wouldn't leave me alone, and it seemed very apropos for this particular fic. I'm not sure what you mean about "having Snarry associated with Hitler makes me uncomfortable," but I'm sorry it did. I'm not sure I had an intention in using the quote, other than that it fit the fic and hopefully gave the reader a little nudge in the direction of "everybody here is lying."