A self-described comedian-activist was one of three protesters whose demonstration against “fascism” in the “art world” interrupted the Metropolitan Opera in Manhattan last week, The Post has learned.

Davidson Boswell, 34, of Harlem was charged with criminal trespassing after he decried late billionaire mega-city-arts benefactor David H. Koch from his seat while two activist buddies stormed the opera house’s storied stage in Lincoln Center and waved banners about 9 p.m. Friday, police said.

A performance at the storied Metropolitan Opera in Manhattan was disrupted by protesters last week. Christopher Sadowski

Security guards ended up hauling the protesters off the stage as the curtain dropped, according to videos posted to social media.

The brouhaha paused the show for roughly 20 minutes.

Koch, who died in 2019, is the namesake of the famed complex’s theater that houses the New York City Ballet and whose conservative donor network has been linked to the Heritage Foundation and Project 2025, according to NBC News.

Comedian activist Davidson Boswell screams from his seat at the Met during the demonstration. X@SeanJoseph1978

Project 25 is a far-right so-called blueprint for the future that aims to restore “the family as the centerpiece of American life’’ while taking other measures from outlawing pornography to closing the border.

“The David Koch Theater, it’s across the street?” Boswell screamed to the crowd Friday. “It’s the same people, they fund it all.”

A video titled “spending the night in jail and fascism normalized in the art world” was posted by Boswell to his Patreon page on Sunday.

The chaotic protest was executed by the newly formed “comedic interventionists” group — dubbed Goofballs — and activists with the environmental advocacy group Climate Defiance, according to sources familiar with the matter.

Boswell says Lincoln Center “is in no position to criticize ICE or fascism because they are helping to normalize it.” Patreon/Davidson Boswell Show

Friday’s protest halted a performance of a revitalized production of “Carmen” set on the US-Mexican border.

One of the activists on stage was clad in military fatigues while the other was dressed as a stage hand.

Both held up signs reading, “We love Lincoln Center, but they’re in bed with fascists.

“The Kochs are murderous ballsacks,” the signs continued. “Koch funds Project 2025, and the horrors depicted on this stage.”

Nate Smith, 37, and Aaron Toplin, 31, were arrested along with Boswell.

“This production of ‘Carmen,’ in which the opera singers are depicted as ICE agents ripping families apart is clearly meant to criticize ICE,” Boswell told The Post in a statement.

But he said the show is “deeply disingenuous and hypocritical” because New York’s arts scene has accepted tremendous donations from Koch.

A request for comment from the Metropolitan Opera was not returned.