There is controversy at George Mason University after Nicholas Decker, an economics PhD student published an essay asking “When Must We Kill Them?” in reference to Trump and his supporters. The essay captures the growing violent ideation on the left, fueled by rage rhetoric from politicians and commentators. The danger is that, for some on the extremes of our society, the question is not “when must we kill them?” but “when can we kill them?” On his Substack “Homo Economicus,” Decker warns that “evil has come to America” and that Trump is “engaged in barbarism” and seeking “to destroy the...