“ The day Charlie Kirk was killed, Dominic Durant’s 11-year-old daughter came home from her middle school in Tulsa, Okla., and told her father that her friends had been very upset about his death, and that they felt she should be upset, too. “I’m sad,” she said, tears in her eyes. Durant struggled with how to respond. He, too, had been appalled by the act of violence. But his young daughter did not know much about Kirk, and he worried she would look him up on YouTube and come across the many ugly assertions the right-wing activist had made about Black Americans like them. For instance, Kirk had claimed that four prominent and successful Black women, who all went to Ivy League universities — Justice Ketanji Brown Jackson, the former first lady Michelle Obama, the TV host Joy-Ann Reid and former Representative Sheila Jackson Lee of Texas — did not “have the brain processing power to otherwise be taken really seriously” and had to “go steal a white person’s slot.” He’d argued that “...