Students gathered in New York City's Washington Square Tuesday to protest the arrest of Mahmoud Khalil, a pro-Palestinian activist at Columbia University who was detained by U.S. Immigration and Customs Enforcement agents this past weekend.

The Department of Homeland Security claimed that Columbia University anti-Israel activist Mahmoud Khalil “led activities aligned to Hamas, a designated terrorist organization."

Some organizations applauded the move. But the raid chilled other American Jews, even some who consider themselves supporters of Israel.