The Metropolitan Museum of Art has announced that its 2027 Costume Institute exhibition — and therefore the next Met Gala, shaped for decades by Anna Wintour — will be devoted to designer John Galliano. The Met describes “John Galliano: Horizons” as a serious examination of both his creativity and the misconduct that destroyed his career. Critics nevertheless see a prestigious retrospective for a living designer as an honor, and the announcement has reopened one of fashion’s most notorious antisemitism scandals.That uproar should alarm every university, museum, foundation and luxury company associated with Sheikha Moza bint Nasser, the mother of the...