JTA — In December 2023, Pamela Nadell, a professor of Jewish history at American University, testified alongside the presidents of Harvard, the University of Pennsylvania, and MIT at a congressional hearing on antisemitism on college campuses. If you don’t recall her testimony, don’t blame her or yourself: That’s the hearing when two of the presidents, Harvard’s Claudine Gay and Penn’s Liz Magill, appeared to equivocate on how their schools were handling charges of antisemitism, and consequently resigned under pressure. At the time, Nadell was at work on a history of antisemitism in America, and could not have known that she...