Since the attack, Diller has spoken at universities around the country, including Yale and Columbia, telling his story in the hopes of combating a rise in antisemitism, he said. Jonathan Diller, a 28-year-old who grew up in Israel, was among a crowd of 3,000 people at the Nova Peace Festival when Hamas attacked, killing around 260 people and taking many hostages. CAMBRIDGE — As a rapt audience fought back tears, a survivor of the attack on an Israeli music festival by Hamas terrorists last month recounted the horror of the massacre at Harvard Hillel on Thursday. Although he has recounted...