Anti-Israel Columbia University protester Mahmoud Khalil has called himself a “political prisoner” — while urging students to respond with even more protests.

“My name is Mahmoud Khalil and I am a political prisoner,” Khalil said in a fiery letter written from his Louisiana immigration detention facility.

Khalil, head of the hardline pro-Palestinian group Columbia University Apartheid Divest, called his arrest “a direct consequence of exercising my right to free speech as I advocated for a free Palestine and an end to the genocide in Gaza.”

He accused Columbia’s leaders of having “laid the groundwork for the US government to target me by arbitrarily disciplining pro-Palestinian students and allowing viral doxing campaigns — based on racism and disinformation — to go unchecked.”

He called for even more protests.

“If anything, my detention is a testament to the strength of the student movement in shifting public opinion toward Palestinian liberation,” he wrote.

“In the weeks ahead, students, advocates, and elected officials must unite to defend the right to protest for Palestine. At stake are not just our voices, but the fundamental civil liberties of all.”

Columbia University denies that leadership invited ICE agents onto campus but said law enforcement can enter campus property with a warrant.

Khalil, 30, a permanent US resident, is being detained in Louisiana despite his lawyer’s petition to have him returned to New York where his eight-month-pregnant wife, who is an American citizen, lives.

He was arrested on March 8 by ICE and is facing deportation for leading activities the Trump administration says were “aligned to Hamas.”

Detailing his arrest, Khalil claimed he and his wife were “accosted” on their way home from dinner by DHS agents “who refused to provide a warrant,” he wrote.

“Before I knew what was happening, agents handcuffed me and forced me into an unmarked car,” he said.

Khalil said he spent a night at 26 Federal Plaza — ICE’s HQ in Downtown Manhattan — before being transferred to a detention facility in Elizabeth, New Jersey, and then taken to Louisiana.

Columbia has been slammed over disruptive pro-Palestinian protests, with Jewish students saying they created a hostile atmosphere.

President Trump accused students of participating in “pro-terrorist, antisemitic, anti-American activity.”Shortly before Khalil’s arrest, the Trump administration froze $400 million in grants to the Morningside Heights school over campus antisemitism.

Columbia responded last week by expelling and suspending many students.The White House has defended the move.

“This administration is not going to tolerate individuals having the privilege of studying in our country and then siding with pro-terrorist organizations that have killed Americans,” said Trump’s press secretary, Karoline Leavitt.

A federal judge this week blocked Khalil’s deportation from the US after his lawyers fought for his immediate release while the court reviews his petition arguing his arrest was illegal.

Khalil separately sued to block Columbia from turning over protesters’ student records to Congress.

He is set to appear before a judge on March 27.