When leftists start caterwauling about civility, it reminds me of when my kids were young. When my daughter Anna was 5 and my son, Jonathan was 4, World War III broke out in our household at least once a day. Anna’s modus operandi, as she explained it to her grandfather, was: "I hit Jonathan. He hits me. Then I tell Mommy." In essence, that’s the leftists’ civility scam: They hit us. We hit back. Then their media lap dogs begin howling about incivility and yapping about the decline of gentility in the political debate (which, if I’m not mistaken, started...