I think the big problem is that he completely ignores any side to the arguement except his own, and that's why he gets so much ire. He went around asking congressmen to sign their kids up for war, and besides the fact THAT YOU CANT SIGN OTHER PEOPLE UP FOR SERVICE, a few said they did have kids over in iraq (and they conviently got edited out of the movie) among other gimmicks. He doesn't actually say anything untruthful, but his selection of facts is very one sided and misleading, trying to play on people's ignorance.
If I were to quote ann coultier or rush limbaugh/O'reilly, i'm sure you'd shoot it down for the same reason, its one sided biased crap that doesn't really have anything new to say. There's also
http://www.michaelmoorehatesamerica.com/ which is actually a look at moore's claims and responses to them.
btw, i'm not voting for kerry or bush, i don't like either one... they both kinda suck in their own way
so i'll probably throw it away on mccain(R) - sen. arizona or eliot spitzer(D) AG - NY (because i believe they both care more about issues than platforms).