Illustration: David Gothard ‘If you’re going to advocate genocide, please do it respectfully.” That’s what I tell my students at the start of my course on war crimes. I’m not sure it would have gone over well in the recent congressional hearings on campus antisemitism. But it could hardly have gone worse than the actual hearings, considering how difficult it was for some university presidents to answer Rep. Elise Stefanik ’s question on whether “calling for genocide violates university’s policies” and how badly their apologies played—the presidents of Harvard and the University of Pennsylvania have since resigned. The line gets...