Palestinian activist Mahmoud Khalil sued Columbia University on Monday, alleging it failed to address harassment against him and other members of a pro-Palestinian campus group and retaliated against them when they reported it.

The university’s “deliberate indifference” led to the doxing of multiple group members and Khalil’s detention by immigration agents, according to the civil rights lawsuit filed in federal court in New York City.

At a news conference announcing the lawsuit, Khalil accused the university of “discrimination aimed at intimidating Palestinian students.”

“We are suing because no student, regardless of their background, should go through the hell that Columbia put us through over all these years,” he said.