Suppose, however, you spent last summer applauding the riots, or dissembling about them, or dismissing them. In that case, to deplore last week’s violence credibly is not so simple. If you demand that your political adversaries adhere to a principle, but exempt people whose cause you endorse from having to comply, then that preference you enjoy boasting about is not really a principle. It is not a standard of conduct applicable to all, in other words, but just another rhetorical device used for political combat.