Some U.S. universities called in police to break up demonstrations against the Israel-Hamas war, resulting in ugly scuffles and dozens of arrests, while others appeared content to wait out student protests Thursday, as the final days of the semester ticked down and graduation ceremonies loomed. Student protest have popped up on an increasing number of college campuses following last week's arrest of more than 100 demonstrators at Columbia University. The students are calling for universities to separate themselves from any companies that are advancing Israel's military efforts in Gaza — and in some cases from Israel itself. Protests on many...