Well, that was a week we could have all done without. As President Obama declared in his legitimately moving speech to what seemed to be the homecoming rally of the Arizona Wildcats, now is a time to re-embrace civility. To that end, now might be a good time to examine the media’s role in this mess. There’s no disputing — nor any surprise — that left-wing activists didn’t need to wait for accurate reporting to jump to conclusions about the “real” culprits in the Tucson massacre. For instance, within minutes of the news hitting the wires, commentator Markos Moulitsas wrote...