Alex,
It goes both ways bro,
Here the Libs get called, wussies, pusses, anti-Americans, Saddam lovers, communists, socialists, and so on.
I think the Hitler thing stuck with some in reaction to that and because of a couple of other reasons. One, Bush's dictorial tendecies, the fact that many think he wants to rule the world and finally the claims that he's a racist.
Personally I don't use the term, or at least I don't think I have. I try to avoid the name calling and totally agree with you on that one. I have however lost my temper a time or two due to the extremely offensive nature of some people's posts here. While some of the Conservs like yourself, Jazz, Razz, support their points of view through debate, there are others that simply use this as a means to insult Libs. Equally, there are Libs that do the same thing.