Jewish educators and activists slammed the United Federation of Teachers leadership for failing to fight antisemitism in the New York City public school system — and for stabbing them in the back by endorsing Israel-bashing, boycott supporter Zohran Mamdani for mayor. One angry educator even urged teachers to stop paying union dues in protest — as others demanded the union retract its support for the socialist Democratic Party nominee. Moshe Spern, the head of United Jewish Teachers faction in the union, blasted the union’s responses to antisemitic incidents at locations such as Hillcrest HS — where a Jewish teacher was...