I don't think there is any real debate over his films: they're his opinion pure and simple. There's really nothing more to it than that.
That's not accurate at all. Moore plays this cute angle where he presents his movies as documentaries full of data and facts aiding the theme, but when called on intentional "inaccuracies" or downright deformation of character through editing, he plays up the, "Hey, it's just a movie, pal" shtick.
The truth is, most people are dummies. Dummies on the Left, dummies on the Right. When anybody takes advantage of that fact and distorts truth to advance an agenda and make some money, it is more than just presenting an opinion.
For the record, I think Moore's a talented guy and if I had no interest in politics and just liked the occasional controlled outrage, I'd probably dig his work. But people need to be honest about what Moore is, what he does and who he influences. Just as we do for Limbaugh, Beck or Maher.