In January, 11 days before his second inauguration, Donald Trump was seated next to Barack Obama at President Jimmy Carter’s funeral. In a surreal moment, the two men were laughing and chumming it up like old friends. In reality, they deeply dislike each other. Still, Obama, as America’s first Black president, knows he must publicly wear the mask. It’s the same mask Black people, and specifically Black men, have long been forced to wear to conceal their true emotions, lest they risk being unfairly judged to be uppity, angry, hostile, difficult, not a “team player,” arrogant, aloof, dangerous, violent. Trump,...