"From the River to the Sea" — shorthand for the obliteration of Israel. It's a phrase meant to terrorize. Here in the U.S., from the Hudson River, New York, to the Pacific Ocean, antisemitism is surging in public schools. The Trump administration, which is cracking down on the abuse of Jewish students on college campuses, needs to also turn attention to the public schools. And people of all faiths need to object. Jews shouldn't have to fight this battle alone. In New York City, antisemitic graffiti, bullying, anti-Jewish slurs and pro-Hamas propaganda are tolerated in public schools, according to the...