A President Trump fan who says he was brutally beaten for wearing a MAGA hat says a hip downtown art pop-up got his underage attackers drunk before the assault, according to a new lawsuit.

Jahangir Turan, 42, says he was left with “brutal injuries” in the July attack by a “dangerous, unruly and belligerent group” that attended an “ABC Angels Club pop-up” event on Canal Street.

The unknown louts insulted him for wearing his red “Make America Great Again” hat, with one knocking it off his head and at least two smashing Turan’s “head and face into the metal scaffolding,” fracturing his eye socket, according to a Manhattan Supreme Court lawsuit filed Friday against photographer and fashionista Anna Bloda — one of the event’s organizers — as well as building owners United American Land and the gallery that hosted the event, Wallplay.

All three parties are responsible for the fact that “alcohol was served without an appropriate license” at the event, with many there — including at least one of his attackers — being under 21, he alleges in his lawsuit.

Turan, from Hoboken, says their “gross negligence” makes them “directly responsible” for the attack by the “as-of-yet unnamed assailants.”

He is also going after the attackers, listed as John and Jane Does — hoping that the organizers will have to reveal their identities as part of discovery during his court battle.

The “ABC Angels Club” event was a “carefully curated” skateboard-inspired showcase for various hip labels, including Bloda’s own “Bloda’s Choice,” the papers say. It is not clear why other artists selling at the event are not being sued.

The lawsuit insists that “these ‘pop-up’ stores pose a danger to their neighborhoods” because there is “little to no oversight” while they “attract unruly attendees and often involve illegally served alcohol.”

Turan is seeking unspecified damages for his “substantial injuries, pain, suffering, and emotional distress,” requesting a jury trial. He previously told ABC that he will only keep his MAGA hat at home since “it’s dangerous to wear a hat like this in New York City.”

Arty photographer Bloda, who moved from Poland seven years ago, told The Post on Sunday that she has nothing to do with the attack — and no way to pay up if she loses the lawsuit.

“I’m broke. I’m an artist hardly surviving in New York,” she said. “I don’t know what happened — I don’t know these people. They were a bunch of skater kids who had nothing to do with me, and they all refused to say who was responsible because they were loyal to each other.

“Someone got out of control — I feel bad, but it’s nothing to do with me.”

She insisted that everyone drinking at the Budweiser-sponsored event was over 21. She also insisted she has nothing against Trump supporters.

“I respect everybody’s political opinions and rights to believe what they want,” she said. “It’s a very bad thing that happened but it’s got nothing to do with me.”

Wallplay and United Land did not immediately reply to messages Sunday.