Threatening to kill or rape someone shouldn’t be banal. It should shock everyone who comes across such a threat. And that should go without saying, except that increasingly it doesn’t, not in a world where the president has said that he longed for the days when disruptive protesters were carried away from the scene “on a stretcher.” It’s perversely heartening to see that the apparent murder of the Saudi journalist Jamal Khashoggi seems to have temporarily interrupted business as usual. Such shock and outrage is crucial, because in a world where dissenters are dismembered, there’s no hope for change. The prospect that you’ll be killed for what you say makes discussion essentially impossible. A society in which critics fear death is a society with fewer critics, and hence with fewer chances for change.