This is why you can't allow radical Islamo-fascist jihadi 'activists' into the country in the first place. Once here, they can marry a US Citizen and parent an anchor baby.
Cut off Columbia University and its students from any Federal funds, including Federal research grants, tuition grants, subsidies, or Federally-backed loans.
If Hamas is a hill Columbia University wants to die on, so be it. Let them suffer the consequences of their radicalism.
It is not in the Public Interest for Federal funds to subsidize a private university that chooses to be a haven for Hamas terrorists, Hamas ideology, and a potential radicalization center for Hamas recruits.
Let's be clear - Hamas wants to 'liberate' Palenstine by exterminating all Jews. It is not a revolutionary ideology of 'liberation'; it's a genocidal ideology that can trace its ideological roots to Nazi Germany.