On the other hand...
It is a provable fact that Rush Limbaugh is not actually the worst person in the world. So apparently Olbermann is lying. Assuming, of course, you're stupid enough to take jokes seriously.
It's particularly funny coming from an ex-sportscaster who is trying to emulate Rush's methods and success almost step by step. Wait for the talk show...
If you want the actual news behind the flippancy, it's that Obama isn't exactly selling himself to blacks as someone representing their own experience or culture. Check the polls.