On Tuesday night, the New York Times revealed a text message that reportedly played some role in Tucker Carlson’s firing from Fox News. And, on the surface, it simply doesn’t seem much worse than the things he said on air. In the text, Carlson describes watching a video of several Trump supporters beating up an (alleged) antifa member on the streets of Washington, DC. His reaction is nuanced: He confesses to feeling a certain vicious bloodlust while watching the video — “I really wanted them to hurt the kid” — but realizes that this is a horrific impulse that ought...