A far-left New York congressional hopeful who just snagged Mayor Zohran Mamdani’s endorsement spewed radical and hateful views online — trashing cops, establishment Democrats and calling the US “a f–ing disgrace.”

Mamdani’s shock endorsement of DSA comrade Darializa Avila Chevalier, 32, angered establishment Democrats who feared it would throw a wrench in the race and help oust five-term incumbent Rep. Adriano Espaillat. 

Avila Chevalier – who’s running as a Democrat – bitterly bashed her party’s standard-bearers, including ripping Joe Biden as a “rapist” and “war criminal” during the 2020 presidential election.

“I’ve voted in every election since I turned 18 but you out of your mind if you think I’m voting for a war criminal,” she wrote on a since-deleted X account.

“This country is a f—ing disgrace,” she added.

She also gleefully mocked Hillary Clinton, slammed Sen. Bernie Sanders’ “liberal Zionism,” posted “f— Kamala Harris” and even needled her fellow lefty firebrand, Rep. Alexandria Ocasio-Cortez, for voting “present” on Israeli military funding.

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The Democratic Socialists of America true believer identifies herself as a “working-class Afro-Latina” organizer, Ph.D. student at CUNY and friend of Mahmoud Khalil, the anti-Israel protester and former Columbia University graduate student whose deportation fight has ignited the left.

She is committed to abolishing prisons, legalizing prostitution and the private use of all drugs, wants to scrap ICE and end all military support to Israel, according to her DSA candidate questionnaire. 

Similar views litter her social media history, often in vulgar terms.

“I forgot to get napkins so I just wiped my hand on the American flag behind me,” she posted online in 2019 along with a smiling face emoji.

As The Post reported over the weekend, she also has a history of slamming interracial relationships.

“Black men [handshake emoji] Arab men fetishizing ugly colonizer women,” she posted in February 2019.

Insiders now fear the rabble-rouser could end up unseating Espaillat in the 13th congressional district covering Harlem, Washington Heights and parts of the Bronx.

House Minority Leader Hakeem Jeffries is anxious that Espaillat could lose the race, seeing a DSA-fueled upset similar to AOC’s 2018 shocking win over former Rep. Joe Crowley (D-New York) as a distinct possibility, one source said.

“His two thumbs up for her are two middle fingers to Hakeem Jeffries,” one high-profile national Democrat said. 

“The mayor will come  to rue the day where he meddled with the makeup of the federal delegation instead of running the city and shaping the political makeup there. He can’t do both.”

One Democratic campaign operative said: “I think the drama is (Espaillat) might lose now.”

The endorsement also risked straining the odd couple-alliance between Mamdani and Gov. Kathy Hochul — a moderate Democrat who announced she was backing Espaillat after Hizzoner endorsed Avila Chevalier.

Avila Chevalier’s résumé includes work for the Families For Freedom organization against President Trump’s first-term “Muslim ban,” a Harlem public defenders office and an active membership in the United Auto Workers union, according to her campaign. 

She intermingled her Democrat bashing with cop hating, writing in June 2020, “Thought we had leveled up the convo from ‘Kamala is a cop’ to ‘All cops are bastards’ but I see some major points need to be revisited.”

At one point, Avila Chevalier simply posted, “I have no nuance to add. F—k Kamala Harris.”

“No more police at all ever,” she also posted, with clapping hands between each word to emphasize the point.

Her anti-Israel views, meanwhile, were not only too radical for progressive darling AOC, but also fellow socialist Sanders, an early backer of Mamdani’s.

“I’m no fan of Bernie’s liberal Zionism to be clear,”  Avila Chevalier posted.

She also oozed contempt for Sen. Elizabeth Sanders and Clinton — but reserved special scorn for Biden, bitterly lamenting his then-ascendent presidential bid in the 2020 Democratic primary, Politico first reported.

“Y’all really sitting here talking about how we HAVE to vote for one rapist over the other rapist,” she posted, referring to sexual misconduct accusations against both Biden and Donald Trump, according to the report.

Mamdani’s endorsement of Avila Chevalier also caused a rift on the progressive left. A group founded by Sanders supporters — the New York Progressive Action Network, or NYPAN – endorsed Espaillat.

“It’s disappointing. Going back on your word is a big sin,” said NYPAN political director Arthur Schwartz, referring to reports that Mamdani had promised to back Espaillat, or stay neutral.

After Mamdani won last year’s Democratic mayoral primary, Espaillat endorsed him with the understanding that the upstart democratic socialist would do the same, insiders said.

Espaillat, who chairs the Congressional Hispanic Caucus, is the first Dominican American and first former undocumented immigrant to serve in Congress. He has so far raised $1.3 million to Avila Chevalier’s $400,000, ahead of the June 23 election, campaign finance records show.

Some of Espaillat’s constituents – and Avila Chevalier’s potential voters – were likewise baffled by Mamdani’s endorsement.

The Rev. Thomas Johnson, pastor at Canaan Baptist Church on 116th Street, said her far-left views on abolishing prisons and legalizing prostitution and drugs simply aren’t “practical.”

“The mayor endorsed her, but he doesn’t have much of a presence in Harlem, at this point, and we know nothing about her,” he said Friday. “My weight at this point would be leaning toward the incumbent, especially right now we have so much at stake.

“Interestingly enough, these folks … they are not far-left. African Americans have always tended to be moderate, centrist.”

Mamdani said his endorsement of Avila Chevalier would be the last in the Democratic congressional primary races. He also backed ally Brad Lander, the former city comptroller, against incumbent Rep. Dan Goldman in the NY-10 race. And he supported fellow DSA member Claire Valdez, a state assemblywoman running against retiring Rep. Nydia Velazquez’s handpicked successor, Brooklyn Borough President Antonio Reynoso, for her NY-7 seat. 

Turning on Espaillat could well backfire for Mamdani and squander precious political capital – all for backing a far-left candidate who aligns with him ideologically but gives him effectively nothing in Congress and New York City, several insiders said.

“If (Mamdani) loses, he’ll have a tough enemy,” a source said, referring to Espaillat.

“He needs to think like a mayor and that means what can this person buy me,” the prominent national Dem said. 

“With this endorsement, he bought nothing. She can’t do anything for him if she gets elected. In New York City, when someone buys something and gets nothing, that’s who we call a tourist.”

— Additional reporting by Khristina Narizhnaya and Carl Campanile