The New York Civil Liberties Union is demanding Columbia University reinstate two pro-Palestinian student groups suspended last semester over protests against Israel’s counteroffensive in Gaza. Columbia, which has been roiled by campus unrest following the Oct. 7 Hamas terror attacks on Israel, has until the end of next week before the NYCLU moves ahead with legal action, according to a letter made public Friday. “If the university is unwilling to reverse its suspension decision and reinstate the groups, the NYCLU is prepared to file a lawsuit to vindicate their rights,” the memo read. Donna Lieberman, executive director of the NYCLU,...