In a dramatic escalation of counter-terrorism measures, the UK government’s proscription of Palestine Action has led to widespread arrests and legal challenges. Since the ban was enacted four months ago, over 2,000 individuals—including teachers, students, clergy, and activists—have been detained under sections 12 and 13 of the Terrorism Act. Many were arrested for merely holding signs expressing opposition to genocide and support for Palestine Action, raising concerns about the erosion of civil liberties.