NEW YORK — Nine people were arrested Friday during protests in and around the Columbia University campus over Israel’s actions in the war in Gaza, police said. A protest that started Friday afternoon was led by the pro-Palestinian group Within Our Lifetime, and drew hundreds of demonstrators, said the Columbia Spectator, a student newspaper. The demonstration gathered on Broadway outside the Morningside Heights campus. Not all the protesters were affiliated with the university. At least one Columbia student was arrested, said Barnard student Maryam Iqbal, 18. “He’s my friend,” Iqbal said of th…