Chappelle's shtick Tom Elliott Aside from a new $50 million contract, what does Dave Chappelle have that Jesse Jackson does not? The answer, Mr. Jackson will regret hearing, is a reason for black youth to value his opinion. Since "Chappelle's Show" debuted two years ago, the comedian has become a ubiquitous American pop presence. Known for skits that regularly break comedic boundaries, Chappelle, like his thematic predecessor Chris Rock, is celebrated for lampooning any subject, regardless of its position in the sphere of P.C. protection. Whites, blacks, Asians, George Bush, Bill Clinton, even Kunta Kinte -- nothing's considered sacred. So-called...