BRISBANE, Australia — The Chinese nationalists disrupting pro-Hong Kong democracy rallies at the University of Queensland arrived 300 strong, with a speaker to blast China’s national anthem. They deferred to a leader in a pink shirt. And their tactics included violence.

One video from the scene shows a student from Hong Kong being grabbed by the throat. Another shows a philosophy student, Drew Pavlou, 20, shouting, “Hey hey, ho ho, Xi Jinping has got to go,” until a counterprotester throws his megaphone aside.

The altercations, which took place last Wednesday in the main square of a major Australian university, were broken up by the police, but experts believe it could be a dark omen of what is to come as the passions of Hong Kong protesters ripple to other countries.

A similar scuffle broke out on Tuesday at the University of Auckland in New Zealand, when three Chinese men were filmed shouting down students from Hong Kong at a rally and pushing a young woman to the ground.