Columbia University has suspended one of several students who disrupted an active class earlier this week and proceeded to utter pro-Hamas propaganda and distribute antisemitic literature, the school announced on Thursday.

On Tuesday, the first day of classes of the new semester, the agitators stormed into Professor Avi Shilon’s course, titled “History of Modern Israel.” Clad in keffiyehs, which were wrapped on their faces to conceal their identities, they read prepared remarks which described the course as “Zionist and imperialist” and a “normalization of genocide.” As part of their performance, which they appeared to film, they dropped flyers, one of which contained an illustration of a lifted boot preparing to trample a Star of David. Next to the drawing was a message that said, “Crush Zionism.”

Another flyer proclaimed, “Burn Zionism to the ground.”

The incident set off an explosion of responses on social media. The US House Committee on Education and the Workforce — now chaired by Rep. Tim Walberg (R-MI) — warned that such behavior “will no longer be tolerated in the Trump administration,” while Columbia University professor and activist Shai Davidai demanded “strong action.” Later, Shilon wrote in an op-ed published by the Israeli publication Ynetnews that Columbia needs to “reevaluate” its safety policies, noting that students should not be able to “walk around wearing masks.”

On Thursday, the university attempted to quell concerns that it would do nothing, as it has been accused of before, and announced that it “has identified and suspended a Columbia participant” of the demonstration. The punishment, it added, will hold until the completion of a “full investigation and disciplinary process.”

The statement continued, “The investigation of the disruption, including the identification of additional participants, remains active. Disruptions to our classrooms and our academic mission and efforts to intimidate or harass our students are not acceptable, are an effort to every member of our university community, and will not be tolerated.”

Columbia University has allegedly refused to levy disciplinary sanctions against anti-Zionist agitators in the past.

In August, the US House Committee on Education and the Workforce denounced university officials for punishing only a few of the anti-Zionist activists who last spring occupied an administrative building and staged a riot which prompted the university to advise Jews to refrain from coming to campus. According to documents shared by the committee, 18 of the 22 students who were given disciplinary charges for their role in the incident were later upgraded to “good standing” despite the university’s earlier pledge to expel them. Another 31 of 35 who were suspended for illegally occupying the campus with a “Gaza Solidarity Encampment” were restored to good standing as well.

Amnestying those students was “disgraceful and unacceptable,” former education committee chairwoman Rep. Virginia Foxx (R-NC) said at the time. She added, “The vast majority of the student perpetrators remain in good standing. By allowing its own disciplinary process to be thwarted by radical students and faculty, Columbia has waved the white flag in surrender while offering up a get-out-of-jail-free card to those who participated in these unlawful actions.”

Meanwhile, Columbia University continues what is widely perceived as a partisan investigation of Davidai, an inquiry prompted by accusations that condemning terrorism is racist and anti-Muslim. In October., the university banned Davidai from campus, an action which prevents him from attending university functions and accessing his office. Since then, Davidai has accused Columbia of prolonging its investigation of his conduct to injure his reputation and destroy his academic career.

At the same time, the university has allowed a pro-Hamas professor and cheerleader of violence, Joseph Massad, to continue teaching about the Israeli-Palestinian conflict, despite that he is on record supporting terror — after the Oct. 7 massacre, for example, he described the Hamas fighters who paraglided into the Nova Music Festival in southern Israel to murder the young people attending it as “the air force of the Palestinian resistance” — and has been accused of antisemitism dozens of times.

On Tuesday, Columbia University Interim President Katrina Armstrong maintained that Columbia opposes antisemitism.

“We want to be absolutely clear that any act of antisemitism, or other form of discrimination, harassment, or intimidation against members of our community is unacceptable and will not be tolerated,” she said in a statement.