New York CNN — Israeli hostage posters that were hung up at Harvard University had been vandalized with antisemitic messages just as students returned from winter break. Harvard condemned the vandalization on Tuesday and said university police are investigating the incident. “The University strongly condemns the senseless and horrific vandalization on Harvard’s campus of posters displaying the faces of Israeli hostages,” a university spokesperson told CNN in a statement. Footage shared with CNN by Harvard student Alexander Kestenbaum shows a handful of hostage posters defaced with messages such as “Israel did 9/11.” A poster of a four-year-old Israeli hostage was...