Cable host Ed Schultz, who on his nightly MSNBC show has lately called for an end to “vitriolic rhetoric” in politics, appears to be engaging in exactly that off camera. The Daily Caller has obtained e-mails that appear to be from Schultz’s account in which Schultz refers to one viewer as a “prick” and “right-wing scum.” Shortly after Keith Olbermann announced his departure from MSNBC, a viewer named Miller Baird e-mailed Schultz. “Hey Ed,” he wrote, “you think Comcast had nothing to do with Keith departure. You are also the same guy that thinks Obamacare is going to lower the...