For sustaining evidence of a world gone nuts with the media’s steady, selective and frightened compliance, there’s Delmon Young — now with the Orioles, who spent the week here playing the Mets, then Yankees. But first the lasting legacy of John Rocker — the big, white, not too bright Braves pitcher quoted in Sports Illustrated making bigoted, ethnic and racist remarks about NYC’s inhabitants. Though he broke no laws or jaws, Rocker, at 24, became a national symbol of hate, a pariah, too. On TV, radio and in print — “Saturday Night Live” to “The CBS Evening News with Dan...