On May 21, Black author Dr. La’Tonya Rease Miles appeared at a book talk to promote her new memoir, “Smart Girl: A First-Gen Origin Story.” Attendees gathered at the quaint James M. Duncan Branch Library in Alexandria, Virginia, hoping to get their books signed and to hear Miles’ inspiring story of being the first in her family to attend and graduate from a four-year university. Instead, they got an earful from a belligerent Trump supporter who crashed the reading. “This is not Nazi Germany! I don’t need to do anything. Stop telling me what to do,” shouted the older white...