IF only it were just about the color of his skin. With all due respect to Jimmy Carter, the racist component of Obama-hatred has been undeniable since the summer of 2008, when Sarah Palin rallied all-white mobs to the defense of the “real America.” Joe Wilson may or may not be in that camp, but, either way, that’s not the news. As we watched and rewatched the South Carolina congressman’s star turn, what grabbed us was the act itself. What made the lone, piercing cry of “You lie!” shocking was that it breached a previously secure barrier. It was the...