Former Pink Floyd songwriter Roger Waters could face prosecution after declaring his support for Palestine Action, a terrorist organization that has been banned by Parliament in the U.K.

Waters posted a video to X on Saturday, in which the Rock ‘N Roll Hall of Fame inductee praised Palestine Action as a “great organization,” while also giving kudos to Bob Vylan, who led the Glastonbury Festival crowd in a chant, shouting, “Death, death to the IDF.”

Waters said in his video that he was in his studio and was working on a piece of brown cardboard with a Sharpie.

He then switched the camera from his face to the cardboard.

The Houses of Parliament in London, UK. (Chris J. Ratcliffe/Bloomberg via Getty Images)

“The Government have assessed that Palestine Action promotes and encourages terrorism. This includes glorification of its attacks involving serious property damage on social media,” Hanson said. “I have to say that we would not tolerate this activity from organisations if they were motivated by Islamist or extreme right-wing ideologies, and therefore I cannot tolerate it from Palestine Action.”

“By implementing this measure, we will remove Palestine Action’s veil of legitimacy, tackle its financial support and degrade its efforts to recruit and radicalise people into committing terrorist activity in its name,” he added.

The Campaign Against Antisemitism, which, according to the group’s site, is a “volunteer-led charity dedicated to exposing and countering antisemitism through education and zero-tolerance enforcement of law,” shared Waters’ video on X shortly after it was posted by the former Pink Floyd member.

The group said it reviewed the post, adding that anyone who expresses support for it, contrary to the Terrorism Act 2000, is committing a criminal offense.

They also said they stand ready to privately prosecute offenders when authorities fail to act.

A spokesperson for Campaign Against Antisemitism told Fox News Digital, “The suggestion that the Jewish state wields excessive political influence is a breach of the International Definition of Antisemitism.”

“Roger Waters has a long history of promoting dangerous conspiratorial tropes,” the spokesperson said. “His declaration of support for Palestine Action, now a banned organisation, is his most legally provocative move yet. We expect the police to take action, and if they do not then we will.”

Reuters contributed to this report.