A disgraced Missouri reporter has been busted for unleashing a campaign of terror against New York-based Jewish centers — after his Brooklyn girlfriend broke off their relationship, the FBI said Friday.

Juan Thompson, 31, was arrested Thursday in St. Louis and accused of making at least eight threatening calls to Jewish community centers — as well as unleashing an email warning of an upcoming “Jewish newtown” — as part of his sustained effort to destroy the reputation of his 32-year-old former gal pal, authorities said.

Thompson previously was fired from online publication The Intercept for making up stories, and sent defamatory emails and faxes to his ex’s employer in addition to making false reports of criminal activity and threats in her name, authorities said.

In an email sent from an anonymous account to a Manhattan JCC on Feb. 7, Thompson used his own name — to try to trick authorities into thinking his ex was trying to frame him, officials said.

“Juan Thompson … put two bombs in the office of the Jewish center today. He wants to create Jewish newtown tomorrow,” the email read.

He made a similar bomb threat to the Jewish History Museum in Manhattan, prompting the NYPD to briefly shut down the institution and conduct a sweep. No bombs were found.

Thompson’s Twitter profile includes, “You show me a capitalist, and I’ll show you a bloodsucker.”

In February, Thompson fired off an email from an anonymous account to the Anti-Defamation League’s national office in Midtown Manhattan stating that the girlfriend was behind the bomb threats at the community centers, officials said.

“She lives in nyc and is making more bomb threats tomorrow,” his email allegedly read.

Thompson also allegedly took a shot at the FBI on his Twitter account after the feds starting closing in on him.

“I got a visit from the FBI. So now I’m battling the racist FBI and this vile, evil, racist white woman,” Thompson, who is black, wrote on the social media site.

On Feb. 27, 2017, he went on a tweeting rampage, saying in one rant, “The @SecretService visited me looked at my tweets, questioned my politics b/c some awful white woman I date reported me. I won’t be silenced.”

In another tweet that same day, he cited the commander-in-chief: “@SecretService … a disgusting nasty racist white woman, who filed a false lie against me, has threatened to kill Trump.”

The woman had struck up a romantic relationship with Thompson in 2015 but broke up with him about a year later, according to court documents.

The very next day, Thompson began his push to ruin her reputation, sending an email to her Manhattan employer purporting to be a producer with a national news organization, the papers state.

In the email, he allegedly told her boss that she had been pulled over for drunken driving and was being sued for spreading a sexually transmitted disease. In another, he claimed that she threatened to kill him.

He also emailed her naked photos of herself and threatened to expose them publicly, according to the papers.

From July 2016 to March 2017, he allegedly continued his cyber-assault, sending her emails and text messages purporting to be from one of his close friends and relatives.

In one message, Thompson insisted he was not behind the harassment because someone had hacked his computer, the documents said.

In another, he allegedly apologized for hurting the victim and wrote her a check to compensate her for her suffering.

He also tried to gain sympathy by falsely telling her that he had been shot several times during a robbery — and had suffered a heart attack, the papers state. In one message, he even told her that he was dying and being taken off life support.

Thompson was charged with one count of cyberstalking and faces five years in federal prison if convicted.

He also tweeted, “Know any good lawyers? Need to stop this nasty/racist #whitegirl I dated who sent a bomb threat in my name & wants me to be raped in jail.”