A handful of alumni from Columbia University’s school of international and public affairs (Sipa) ripped their diplomas in a show of protest against the federal government’s jailing of graduate student Mahmoud Khalil’s over his activism for Palestinians. On Saturday, instead of participating in the university’s annual Sipa alumni day, a few dozen alumni and students gathered outside campus as part of a protest organized by Sipa’s and Barnard Alumni for Palestine groups. The groups wrote on Instagram: “Join us March 29th at 1pm to PROTEST SIPA Alumni Day and demand justice for our community. Mahmoud Khalil – our colleague, our