A group of 13 people were arrested at Princeton University on Monday night while participating in a Gaza protest on campus, Chris Eisgruber, the university’s president said in a statement. The protest, which took place at the graduate school’s Clio Hall, was just one of several that have been held on the campus in the past week. Tensions have been building as students, faculty and staff have been calling on the university to divest its investments from firms profiting from the Israel-Hamas war. The 13 protestors had occupied Clio Hall in what Eisgruber called “completely unacceptable” and “a s…