Immigration control advocates protested outside Columbia University yesterday because students haven’t been disciplined for violently disrupting a speech by the founder of a civilian immigration monitoring group. On Dec. 22, campus president Lee Bollinger said students involved in the disruption could face disciplinary measures. “We want these students expelled,” said Joanna Marzullo, president of New Yorkers for Immigration Control and Enforcement and granddaughter of legal immigrants. Her reasons? “The violence cannot be ignored.” And, “It’s an insult to the [immigrants] who are here legally.” Just so.