Today’s Left is at peak political insanity. Who could imagine massive rallies supporting government bureaucratic bloat and wasteful spending? Or that young women, undoubtedly feminists, protesting on behalf of Muslim terrorists? Why do public officials defend boys participating in girls’ sports? Why would climate activists vandalize Tesla despite the company’s stellar environmental record? Meanwhile, college professors toss around terms like “Nazi” and “fascist” in ways divorced from their actual meaning. Why is a free sex-change operation for incarcerated illegal migrants a riveting presidential campaign issue? Such madness defies rational explanation. America is not in an existential crisis. For nearly everyone,...