Accused anti-Semitic bomb hoaxer Juan Thompson has a long history of ridiculous lies and frightening threats — everything from once boasting he got a Malcolm X tattoo to vowing to smear his rivals as “racists” and ruin their careers, according to people who count themselves as his victims.

“He told me I wouldn’t get a job once he was done with me,” former friend and Vassar College classmate Ian D’Emilia told The Post.

Thompson, a 31-year-old disgraced journalist, remained jailed on federal cyber-stalking charges Saturday for allegedly calling in eight bomb threats to Jewish organizations.

D’Emilia, who was Thompson’s roommate in 2013, earned Thompson’s ire last year after Thompson was fired from the Intercept news website for making up quotes and sources.

When reporter Doyle Murphy of Riverfronttimes.com — based in Thompson’s native St. Louis — called him earlier this year for comment, D’Emilia told her that Thompson had always been a bit weird.

Incensed by the story, Thompson allegedly embarked on a reign of cyber-terror against both D’Emilia and Murphy.

Thompson texted D’Emilia, and “He said that he’d tell my future employers that I’m a racist and homophobe,” D’Emilia said.

Soon, both his boss and graduate adviser received emails similarly smearing him, D’Emilia said.

Murphy fared worse.

“Thompson was pissed” about last month’s article, she recalled Friday on Riverfronttimes.com.

“He emailed my boss and tried to get me fired. When that didn’t work, he emailed me.

“ ‘You are a white piece of sh– who lies and distorts to fit a narrative,’ ” he wrote me in October.”

Among Thompson’s “whoppers”:

During his senior year at Vassar, Thompson pretended he won the lottery and that his memoir was to be published by HarperCollins, his roommate said.

“He would lie for no reason,” D’Emilia said. “Almost to the point of there being something psychologically wrong with him.”

In December, he retweeted a food blogger’s photo of a glass jar of homemade kimchi, claiming he’d made it himself.

Recently, Thompson “posted a picture of his new Malcolm X tattoo,” Murphy wrote Friday.

“I searched ‘Malcolm X tattoo’ in Google images, scrolled down and found the image. He had simply reversed it.”

Over the past few months, Thompson also “took imaginary trips to Cuba and Senegal,” posting photos of his “travels” probably cut and pasted from elsewhere on the internet, said Murphy.

“He lied about the weirdest things,” Murphy wrote Friday.