Palestinian photojournalist Motaz Azaiza joined US students at a pro-Palestinian protest camp at Columbia University on Tuesday, calling for a ceasefire in Gaza and divestment from companies linked to Israel. Students have been protesting regularly at the New York university since 7 October in support of Palestinians and calling for an end to its financial ties to Israel. An encampment which started last week, occupying one of the university’s main squares, has triggered similar protests in universities across the US and abroad. Columbia University has been criticised for its attempts to crack…