When Rep. Joe Wilson yelled “you lie!” — which he most certainly should not have done, everyone was convinced that racism was the only explanation. But when a Democrat shouts, admittedly in a different forum, F*** the president, no such speculation arises. That’s fine, I’m fairly sure that racism isn’t the culprit here. But I’m also sure that if this was a story about a Republican, Maureen Dowd and Frank Rich would bang out several columns insisting that racism told the whole story and Keith Olbermann would be busting out his Field Guide to North American Klansmen. Of course, Olbie’s now so mad at the president, he must be wondering if he’s a racist.