Only a fool believes that all those with whom he differs are bad people. Moreover, just about all of us live the reality -- often within our own family -- of knowing good and loving people with whom we strongly differ on political, religious, social and economic issues. That said, I have come to believe that the more committed one is to leftism, the more likely one is to become meaner. Two examples in just the past week offer compelling evidence. Prominent left-wing commentators used the way in which Rick Santorum and his wife handled the death of one of...