There's a common saying around the Monastery: "Judge what is said, not who is saying it".

Um...I don't think it's that common. I've never heard it before. (yes, yes, I know I'm a newbie, but I've still never heard it before). I even did a super search on various sub sections of it, and couldn't find anything similar.

PS. I thought the trick to winning an argument was to compare your opponent to Hitler, not the KKK: http://www.somethingawful.com/articles.php?a=2715 (I have not made this a link, as it is potentially offensive... funny, but offensive, too.)