NEW YORK — An Upper East Side anti-Muslim rally led by Jan. 6 rioter and far-right influencer Jake Lang erupted into chaos as Lang and his cronies were confronted by scores of counter-protesters outside of Gracie Mansion on Saturday — the home of Mayor Zohran Mamdani, the city’s first Muslim mayor — and a smoking improvised device was thrown, sending demonstrators scrambling for cover.

A group of counterprotesters were also pepper-sprayed as they chased down two Lang supporters, videos posted online about the wild protest show.

Saturday’s anti-Muslim protest — with Lang demanding an end to what he sees as the “Islamification of New York City” — was fueled by the ongoing war in Iran and Mamdani’s election to City Hall.

During the protest someone threw a homemade device at Lang and his crew, which amounted to about 10 people. The object gave off some smoke, but didn’t explode.

“They threw a bomb at us!” Lang and his supporters screamed as a suspect was handcuffed.

“Get your s— together!” Lang yelled at cops. “This should be a state of emergency!”

It was not immediately clear if the device was a smoke bomb, or an actual explosive that didn’t ignite.

“I just survived an assassination attempt by these two Muslim men,” Lang posted on X. “The homemade bomb they threw landed 3 feet in front of me. The detonator failed to ignite, because God is on the throne of my life.”

Cops grabbed the device thrower and an associate, but it wasn’t clear if they were Muslim, as Lang accused. The man who threw the device had another one on him as cops jumped on him and wrestled him to the ground.

By the time the protest ended, at least six people were in custody, including the one who hurled the device and the Lang supporter who pepper-sprayed counterprotesters, according to police sources. The NYPD could not provide a final arrest count Saturday afternoon.

Mayor Mamdani had no scheduled events Saturday and it wasn’t clear if he was at Gracie Mansion when Lang arrived. An email to City Hall for comment about the protest was not immediately returned.

Pro- and anti-Muslim protesters openly shoved and kicked each other during the protest, which began with Lang holding a pig roast at a cafe on East 88th Street and York Avenue — a direct slap in the face against practicing Muslims, who aren’t allowed to eat pork.

Lang and a handful of associates then carried the roasted pig, wrapped in tin foil, down York Avenue against a growing sea of counterprotesters.

Counterdemonstrators banged drums and called Lang and his supporters “Nazis.”

Close to 100 counterprotesters screamed and lobbed eggs at Lang and his supporters as the latter demanded Mamdani be deported and screamed “USA!” back at the demonstrators.

Lang also brought a live goat to the protest, which he called “Mamdani’s second wife.”

Overwhelmed by the counterprotesters, Lang his supporters ultimately ran to a nearby U-Haul truck. Demonstrators tried to prevent their escape as Lang threw himself and his goat into the truck. Protesters then chased after the truck, damaging it, as it sped off.

“It’s almost laughable how successful we were in comparison to those Nazis,” counterprotester Isabelle Pinsky, 29, told the Daily News. “There were like six of them and there were tons of us.”

Pinsky said she supports Mamdani, but “was pissed at him” for meeting with President Donald Trump. But the mayor wasn’t what brought her to Gracie Mansion on Saturday.

“(My goal was) to come here and yell at some Nazis,” she said.

She also wasn’t too concerned about the device that was thrown.

“I saw a small box and there was a little bit of fog,” she said. “The cops reacted like it was a live bomb. The drama was a lot of drama.”

Before the chaos, one of the first counterprotesters to arrive at Gracie Mansion was 87-year-old William Voelkle. The lifetime Upper East Sider, who has only one eye, proudly walked into a cordoned-off area, his cane leading the charge.

“I’m in favor of the new mayor and against the other side that’s protesting against, I guess, what they call the Islamization of Gracie Mansion, which is ridiculous,” said the octogenarian, who saw a poster about Saturday’s protest pasted on a street lightpole.

Voelkle hoped his “presence” would speak volumes against Lang and his cronies.

“I have a cane, and I have difficulty walking, but I felt I wanted to come,” he said. “I just hobble along.”

Lang was one of more than 1,500 people pardoned by President Trump after their criminal convictions relating to the Jan. 6 insurrection at the U.S. Capitol.

He has since become a right-ring provocateur, holding a pro-ICE demonstration in Minneapolis, during which he claimed he was stabbed by a counterdemonstrator and was saved by his protective vest.

On Friday night, three people were taken into custody amid a clash between pro-Iranian regime demonstrators, who erected a shrine to the slain Ayatollah Ali Hosseini Khamenei, the former supreme leader of Iran, and anti-Khamenei protesters at Washington Square Park.

The three people arrested were given criminal court summonses and released, an NYPD spokesman said.

Lang briefly showed up in a van during that protest and committed a lewd act directed at the pro-Iranian regime protesters.

Khamenei was assassinated by an Israeli airstrike on Feb. 28 at the outset of the joint Israeli and U.S. operation intended to topple the Iranian government.

Trump on Friday demanded the “unconditional surrender” of the Iranian regime and the installation of “acceptable” leaders as conditions to end the weeklong war with Tehran that has spread across the volatile Middle East.

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(With Rocco Parascandola and Barry Williams.)

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