I have mixed feelings on Michael Moore. On one hand, I agree with many of his views and respect his ability to make documentaries. (I'm using the label "documentary" for simplicity's sake.) On the other hand, it's completely true that he doesn't even attempt to be fair in his documentaries. I also think he comes off as a bit of a lunatic in interviews and such. When he's put on the spot, I don't think he does a very good job of defending himself sometimes.

So I guess to answer the question, I don't think he's a bastard at all, but I don't think he's a genius. He's very good at presenting facts and making implications based on those facts that may or may not be true. He's also very good at manipulating emotions through his works. One minute you're laughing, the next minute you're near tears. Whether you like it or not, that's talent.