Aside from legitimate concern about the genocide in Gaza, there's also been a rise in good-old-fashioned antisemitism, especially among young people: https://www.adl.org/resources/press-release/46-adults-worldw... . For instance: 40% of those under age 35 affirm that “Jews are responsible for most of the world’s wars” while it is 29% for those over 50, a remarkable 11 percentage point difference.