WATCH: Trump supporter flips out on cop after threatening to burn down Starbucks

One of President Donald Trump's supporters went berserk during a demonstration in New York City.

The man, who appears to be the Trump fan Dion Cini, threatened to burn down a Starbucks while clashing with counter-protesters in Rockefeller Plaza, where some of the president's supporters gathered to wave signs and pester passersby.

"That's when the [Trump] group showed up and started shouting profanities, and saying how 'it's Proud Boys' turn,'" says Tik Tok user megrabah, who posted videos of the incident.

She said the Trump supporters threatened to burn down businesses, and the man in the red hat targeted a nearby Starbucks to set on fire, and then a police officer arrived and told the man to leave.

"Who the f*ck are you?" the man screams.

"I'm the f*cking police," the officer screams, even louder.

Another video shows the officer talking to a witness who says the Trump supporters instigated the clash, and the man complains the officer won't talk him.

"I tried to f*cking talk to you," she bellows, and returns to questioning witnesses.

@megrabah

Reply to @meggoleggo08 storytime part 1

♬ original sound - Megan Elizabeth

@megrabah

what an eventful evening in nyc #SelfImprovement#REMDreamCheck#selenanetflix

♬ original sound - Megan Elizabeth

@megrabah

Reply to @flowerpower8389 ask and you shall receive

♬ original sound - Megan Elizabeth