A Jewish New Yorker described Tuesday how he was stabbed just centimeters from his heart by a hateful sicko — who made a chilling promise before lunging at him on a Brooklyn street.

“I’m going to kill a Jew today,” the knife-wielding goon seethed before launching the antisemitic attack, said victim Elias Rosner, 35, in an interview with The Post on Wednesday.

Rosner, a member of the Lubavitch Hasidic community in Crown Heights, had just left the temple on Tuesday afternoon when he came across the still-at-large attacker spewing antisemitic slurs.

“I was waiting in a crowd of Jewish people and this guy started spouting stuff,” Rosner recalled.

Elias Rosner was attacked by a knife-wielding man in Crown Heights in an antisemitic incident on Tuesday afternoon.

Elias Rosner used his sweater to fend off a knife thrust but still suffered a deep gash to his chest.

“I’m going to kill Jewish people, I’m going to kill a Jew today, I don’t give a f–k … We wouldn’t be in this mess if the Holocaust had happened,” the unhinged man ranted, according to Rosner.

The man “looked very serious” — but Rosner refused to cower in the face of the ugly threats, he said.

Elias Rosner, 35, reveals his injuries following an antisemitic attack in Crown Heights on Tuesday afternoon. Obtained by NYPost

Rosner was stabbed once in the chest, at the corner of Kingston Avenue and Lincoln Place around 4 p.m., by the madman, police said. Gabriella Bass

“I guess I was the one guy that had the bravery to look him in the eye,” he said.

“So, he was waiting. He set a trap up for me a block ahead. He came around the corner and it just started happening.”

Rosner was stabbed once in the chest, at the corner of Kingston Avenue and Lincoln Place around 4 p.m., by the madman, police said, adding the NYPD was investigating the attack as an antisemitic hate crime — on the third night of the Hanukkah Jewish holiday.

The Brooklynite only narrowly escaped with his life — miraculously saved by his sweater, he said.

Rosner, who works at a pop-up Hanukkah donut shop on Kingston Avenue, said he’s trained in martial arts and was ready to defend himself against the armed creep.

“So, he brandishes his knife … I’ve been standing all day, and between fight, freeze and flight. I really only had to choose between freeze and fight, and I chose to fight,” Rosner recalled.

The unidentified suspect was caught on camera spewing antisemitic slurs in Crown Heights on Tuesday afternoon.

The NYPD is looking for help to catch this man, suspected of an antisemitic attack in Crown Heights on Tuesday.

“I believe in standing up to bullies,” he said. “I knew it was on. I luckily had taken off my sweater to use as a sarong to catch the blade. I could just tell he wasn’t going to be doing anything fancy…

“I was able to catch most of the force of the blade with the sweater and that’s basically what saved my life.”

Rosner suffered a deep gash near his heart, but was able to walk away without serious injury. 

Rosner said he has martial arts training and was ready to defend himself against his antisemitic attacker. Obtained by NYPost

He was treated at Kings County Hospital and released — while his attacker fled and remained on the loose Wednesday.

The NYPD released surveillance footage of the attack and of the suspect, seen wearing blue jeans and a black varsity jacket with the word “Genuine” on the back and the number “91” on the sleeve.

Rosner said the attack was part of the uptick in antisemitic sentiment following Israel’s war against Hamas in Gaza, with the anti-Jewish hate trickling down to Big Apple neighborhoods, including on college campuses and in the subways.

Just in recent weeks, the city’s Jewish population, the largest in the world outside of Israel, has been rocked by a rash of antisemitic incidents, including physical and verbal assaults and vandalism.

“It used to be when I was a kid we’d come out from a party late at night, and the worst thing we had to worry about was, ‘stop and frisk,’” Rosner quipped. “Nowadays, it’s a lot tougher, but my motto is, ‘If you stay ready, you ain’t got to be ready.’”

Despite the recent uptick in reported antisemitic attacks, NYPD data show that anti-Jewish hate crimes were down 9% this year through Monday, compared to the same period in 2024. 

So far this year, 305 of the 550 total hate crimes reported to the NYPD targeted Jewish residents and property, according to the police department stats.That’s compared to 2024, when police reported 646 bias incidents, 334 of them labeled as antisemitic.

“Here in America, everybody has a right to live free of oppression,” Rosner said, “and we also have to stand up to bullies who are trying to take that away from people.”

— Additional reporting by Amanda Woods