But police violence, and Trump’s daily assaults on the presidential competence standard, are only part of the disaster. On the other side of the political aisle, among self-described liberals, we’re watching an intellectual revolution. It feels liberating to say after years of tiptoeing around the fact, but the American left has lost its mind. It’s become a cowardly mob of upper-class social media addicts, Twitter Robespierres who move from discipline to discipline torching reputations and jobs with breathtaking casualness.