It’s no shocker to say the left, as a whole, needs a good mouth-washing with soap. As comedian Samantha Bee and her jaw-dropping, C-word-slinging verbal attack on Ivanka Trump shows, there seem two standards at play with public speech, one guiding conservatives, one guiding liberals. And the one basic rule to remember, it seems, is that for liberals, there are no hard-and-fast codes of etiquette, of fair play and common courtesy to abide. So long as they’re responding to some sort of conservative thought or remark or individual, it’s free-for-all-Friday. Anything goes, the more shocking the better. But it’s not...