I used to think that Michael Moore was a reasonably smart filmmaker who purposefully distorted the truth to score political points. The massive holes in all his films have been discussed to death in various forms of media, so I won't recount them here. However, I always thought that he was in on the joke, that he realized the glaring omissions, inaccuracies and outright lies but thought this was tolerable in search of his larger point.
Watching interviews with him over his new film Capitalism: A Love Story, I've come to realize that Moore isn't in on the joke. To put it bluntly, Michael Moore is dumb.
Witness his profoundly un-funny (and unsatisfying) appearance on Jay Leno and then watch this video of an undergraduate Bureaucrash-rocking student taking on Michael Moore and pretty much decimating the Oscar-winning filmmaker.