New York event planners have been inundated with soaring demand for beefed-up security — including hiring armed guards and bomb-sniffing dogs — from Jewish clients rattled by unprecedented levels of antisemitism over Israel’s war with Hamas, Side Dish has learned. The explosion of pro-Palestine protests — with some cheering the barbaric Hamas attack in Israel on Oct. 7 — along with hate crimes that have included swastikas being tagged on properties in Manhattan and the Hamptons, have led to an atmosphere of extreme caution, several event planners said. At a recent bar mitzvah in Tribeca, guests who did not want...