The Passover Seder is built around four questions, all asked by the youngest child at the table. But there is a fifth question, arguably the oldest Jewish question of all, that has been asked in every generation, in every language, under every oppressor: why do they hate us? After the Holocaust, antisemitism was pushed to the fringes in the West. Since October 7, it is back, louder and more mainstream than most of us have seen in our lifetimes. The question demands an answer.