A network of Jewish alumni from Columbia University sent a scathing letter to President Minouche Shafik for allowing anti-Israel protesters to continue to invade campus — warning that violence against Jewish students may be imminent.

“At present, new, unauthorized protests are disrupting classes and creating an irrefutably unsafe environment for Jewish students,” the Columbia Jewish Alumni Association wrote in the letter dated Friday.

As of Friday night, protests demanding the university divest from Israel were still going strong after over 100 participants were arrested when the NYPD stormed the original tent encampment demonstration.

Numerous protesters who were not associated with Columbia swarmed campus — including actress Susan Sarandon and a former professor who once threatened a Post reporter with a machete.

The alumni group fears that “violence against Jewish students is imminent” due to the tensions around Israel’s war and the protests on campus.

The letter cited several troubling incidents that unfolded over the past few days – including when protesters were filmed shouting “The seventh of October is going to be every day for you” – referring to Hamas’ deadly terror attack on southern Israel last fall.

Antisemitism controversy at Columbia University: Key events

• Columbia University President Minouche Shafik stepped down on Aug. 14 after facing backlash over the Ivy League’s anti-Israel protests.
• More than 280 anti-Israel demonstrators were cuffed at Columbia and the City of New York campuses in a “massive” NYPD operation a few months ago.
• Over 100 people were nabbed at the Ivy League campus after cops responded to Columbia’s request to help oust a destructive mob that had illegally taken over the Hamilton Hall academic building in April, NYC Mayor Eric Adams and police said.
• Hizzoner blamed the on-campus chaos on insurgents who have a “history of escalating situations and trying to create chaos” instead of protesting peacefully.
• More than 100 Columbia professors signed a letter defending students who support the “military action” by Hamas.

Columbia suspended students who participated in the tent encampment ahead of the arrests on Thursday, but that has not deterred the bulk of the demonstrations, the Jewish alumni group said.

“Suspended students, along with some faculty, are actively participating in these ‘protests’ and are openly fomenting unrest,” the letter read. “In addition, many outside protestors have flocked to Columbia’s campus in order to disrupt campus life and threaten its students.”

The alumni group pointed Shafik to a petition organized by Jewish students asking to take their remaining spring semester courses online due to fear over violence and intimidation in the classroom.

“While in their Barnard dorm, two students were threatened by protesters. A group of about 4 people put their middle fingers up and started aggressively screaming ‘we know where you live now’ and ‘you killed half our family,’” the petition stated.

One of the first signers on the petition was Eden Yadegar, a student at Columbia’s School of General Studies and the Jewish Theological Seminary.

“I don’t see the situation getting better anytime soon,” Yadegar told The Post shortly after the arrests on Thursday. “There’s no dialogue whatsoever.”

“It is clear to us that Columbia is now under mob rule – a mob, by the way, that is only interested in attention and chaos, rather than thoughtful dialogue or reasoned debate,” the CJAA letter added.

In a conversation with The Post Thursday, Jewish alumni association co-founder Tyler Korff said that he was not interested in demanding President Shafik resign in the wake of her controversial congressional appearance over antisemitism on campus.

While he considered Shafik’s definition of antisemitism “grossly inadequate,” Korff said he would “rather work collaboratively with the university to improve the environment” as opposed to pushing for a complete shake-up.