You might have assumed that those within the Harvard community who disagreed with the Harvard Crimson ’s editorial endorsing nonviolent BDS would be measured and reasonable in their reactions. After all, Harvard is a university where calm intellectual inquiry is supposed to reign. You would have been wrong. The Harvard Crimson ’s original editorial was a model of polite reason. But some of the responses were anything but. Harvard’s former president, Larry Summers, said the editorial endorsed positions that “were basically antisemitic, immoral, poorly thought out.” Alan Dershowitz, once a respected professor at Harvard Law School, agreed that the editorial...