Protesters calling for Israel to cease fire in its war with Hamas who have disrupted US public events and infrastructure are practicing “leftwing fascism” or “leftwing totalitarianism”, a senior US House Democrat said, adding that such protesters are “challenging representative democracy” and should be arrested.

“Intimidation is the tactic,” said Adam Smith of Washington state, the ranking Democrat on the House armed services committee. “Intimidation and an effort to silence opposition … I don’t know if there’s such a thing as leftwing fascism. If you want to just call it leftwing totalitarianism, then that’s what it is. It is a direct challenge to representative democracy now.”Smith was speaking – before the outbreak this week of mass protests on US college campuses, many producing arrests – to the One Decision Podcast and its guest host Christina Ruffini, a CBS News reporter.

Ruffini asked Smith about protests in his district, including vandalism at his home and a town hall meeting disrupted by protesters demanding an end to the Israeli bombardment of Gaza prompted by attacks by Hamas on 7 October.

Disruptive, aggressive protests are “illegal … completely wrong … and enormously dangerous”, Smith said, adding: “I really want people to understand – and I put out a statement after they shut down a town hall meeting that I was trying to have [in March] – what’s going on here.