Someone should post a sign in the Senate cloakroom or wherever Important People Who Should Know Better will see it. The sign would warn politicians against comparing anything to the Nazis or Hitler or the Holocaust. These comparisons are not a good idea. Repeat : Not a good idea. It will only bring a massive headache, as Sen. Richard Durbin has learned (he'll take that Tylenol IV drip now, thanks). Durbin became the latest politician who couldn't make his point without comparing the matter at hand -- the alleged mistreatment of prisoners at Guantanamo Bay, Cuba -- with the methods...