OUTSIDE abortion clinics is fine. OUTSIDE the uni property, fine. ON uni property, occupying buildings and advocating for armed resistance, not fine, just like abortion clinic protestors are not allowed on clinic property. Protest in the US may only legally be held on public property, and unis are not public property.
His group, CUAD, in October 2024 issued a statement supporting "liberation by any means necessary, including armed resistance," retracting an earlier apology for a member’s violent remarks and asserting that "violence is the only path forward" against oppression.
Green card holders can PEACEABLY (the Constitution's word) assemble, but they may not occupy buildings they don't own, hold other students hostage or advocate for violence.