The rise of Yiannopoulos can help to explain the rise of Donald Trump. Both have attracted followers that feel silenced, ignored, and invalidated by the left. Both will continue to receive sympathy and exposure if their opponents continue to aggressively and instinctually dismiss their views. And perhaps both can be defeated—or at least weakened—through respectful and empathic discourse. More broadly, the story of Yiannopoulos is useful to understand today’s political climate. There is an ever-growing number of Americans—liberals and conservatives—who feel like their voices are not being heard. Americans are increasingly identifying with their party, race, gender, or sexuality—and are...