The chants and signs in support of Hamas are becoming increasingly dangerous. They go well beyond supporting the people in Gaza, or even opposing Israel’s right to exist. Some now defend the murders and rapes committed by Hamas and demand even more violence against Israeli citizens. Protesters chant, “We are Hamas,” “We love Hamas rockets,” ”Burn Tel Aviv to the ground” and “10,000 repetitions of October 7th.” A leader of the Columbia rioters recently said “Zionists don’t deserve to live” and that he feels “very comfortable calling for these people to die” (though he later apologized). If Hamas is not...