Parker and Stone Need to Chill
2002:  Matt Stone, a native of Littleton, Colorado, willingly appears in Michael Moore's Bowling for Columbine, a film documenting, among other things, the case for gun control in America. 
2004:  Stone, with partner Trey Parker, produces and writes Team America: World Police.  Among the celebrities knocked is Michael Moore. 
        It makes sense that the creators of South Park would rip on Moore.  After all, their entire shtick is about providing a political perspective for the layman.  Politicians and pundits from all sides are continuously reduced to subjects of fart and diarrhea jokes as their policies and views are swept aside.  When South Park first started way back in 1998, it was a refreshingly funny gag.  Also, I was 12. 
       But like Lucasfilm, South Park is guilty of exercising the same kind of monopoly it rails against.  Political speech no longer comes from the top-down; bloggers, Jon Stewart, and Parker/Stone have all seen to that.  Instead, the new authoritative voice in popular politics is the libertarian South Park, and Parker and Stone are determined to keep it that way. 
Their beef with Moore - ostensibly over the cartoons used in Bowling for Columbine - really has more to do with their desire to be the only people in America that can be funny and political (not to mention that Moore was advocating a non-libertarian position).Their work now has more to do with preserving their position in entertainment than with promoting supposedly ignored, middle-of-the-road politics.
        For example, take their recent 2-part episode on Family Guy. Yeah, it was funny, but what was it really about?  The episode would have us believe that Parker and Stone are pissed off because people constantly say to them, "Hey, you guys must really like Family Guy."  But as celebrities, the two are used people saying TONS of the same stuff to them.  After South Park: Bigger, Longer, and Uncut came out, people were probably coming up to them and saying, "Hey, Kyle's mom is a big fat bitch" or "Blame Canada!"  about 600 times a day. That didn't seem to bother them, or at least not enough to make an episode about it.  But when someone starts talking to them about something that's not theirs, oh God, it's unforgivable. 
        And that's the oxymoron of Trey Parker and Matt Stone:  They have no problem stripping other celebrities of their dignity, but they can't bear the thought that their own personas might be attached to something like Bowling for Columbine or Family Guy. What's worse, no one is even treating them poorly. The guys just can't handle having their names out of their own control, even though they do it to other people every week, and in a much more negative way.
Conclusion? Parker and Stone need to chill.  Maybe instead of only making fun of the people they perceive as threats to their own fame, they could take on subjects more meaningful to the other 290 million people in America.  If we're lucky, maybe the next season of South Park will see its first Bush joke.  Ever. 
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P.S. It probably won't.