On April 10, Microsoft uploaded a film to its YouTube account about Marina Abramovic, the Serbian performance artist known for pushing her body to the limit.
Ms. Abramovic’s work can be violent, sometimes bloody, but the Microsoft video was more innocuous: It was focused on “The Life,” in which museumgoers wear special headsets so that Ms. Abramovic seems to appear before them.
The video was essentially some P.R. fluff for the tech company’s role in the artwork, which is scheduled to be auctioned by Christie’s in October. But in one corner of the internet, it was seen as something else entirely: evidence of a Satanist conspiracy.
Soon after the film appeared, it was being discussed in those terms on Reddit and other social media platforms. An article on the conspiracy theory website Infowars accused Microsoft of working with a “witch,” a “black magic performer” and a “Luciferian individual.”
As the online clamor escalated, the YouTube clip racked up more than 24,000 dislikes. Microsoft took it down on April 14. “We recognize that our association with this project served as a catalyst for online attacks,” a Microsoft spokeswoman said in an email.
Ms. Abramovic said in a telephone interview that she was not consulted before Microsoft took the video down, adding that she had rarely spoken about her treatment by conspiracy theorists because she did not want to encourage them. She is breaking that silence now, she said, because she is fed up.
“I need to open my heart,” Ms. Abramovic said. “I really want to ask these people, ‘Can you stop with this? Can you stop harassing me? Can’t you see that this is just the art I’ve been doing for 50 years of my life?’”
“We had lots of fun,” she said. “There was no human blood, or baby serving, or sex orgies.” So when the conspiracy theories started popping up, Ms. Abramovic said, she thought it was “just insane.”
“I am an artist, not a Satanist!” she said.
Ms. Abramovic said she expected the rumors to last a few weeks, at most, then disappear. Four years later, they haven’t.
On the same day Microsoft released its video, a group of conspiracy-minded filmmakers uploaded a 78-minute film to YouTube called “Out of Shadows,” which resurfaced all the old claims about Ms. Abramovic, and also suggested that she had used mind-control techniques on Lady Gaga, the pop star. That video has since been viewed more than nine million times.
Ms. Abramovic said she was most hurt by how the conspiracy theorists took images from her work and twisted the meaning to bolster their case. Among those images, she said, was a picture of her sitting on a pile of bloody cow bones. The image was from “Balkan Baroque,” a work that Ms. Abramovic performed at the 1997 Venice Biennale, where she won the Golden Lion for Best Artist.
In that piece, she spent five days in a sweltering Venice basement, trying in vain to scrub the bones clean. It was a comment on the Balkan wars of the 1990s, Ms. Abramovic said, and how, once blood is spilled, you can’t wash it off your hands.
“How can this be satanic?” she said. “Tell me!”
Another image used repeatedly shows Ms. Abramovic holding a bloody ram’s head: This photograph was taken from a 2014 photo shoot for Vogue magazine’s Ukraine edition, and was intended as a comment on that country’s war, she said. (This one did “look like something out of a satanic movie,” she said with a laugh, but that was clearly not the intention.)
The online harassment hadn’t impacted her professionally, Ms. Abramovic said, since “the people who really have common sense in this business see this as nonsense.” But the threats have taken a toll on her private life. “I am personally afraid that any kind of lunatic with a gun will come and shoot me, because they think I’m a Satanist,” she said.
Ms. Abramovic said she had considered taking defensive measures: She said she consulted lawyers on April 17 about suing Alex Jones, the founder of Infowars, over articles about her on the site. “He’s making money from hurting innocent people,” she said. But she ultimately decided any action would be too expensive and take years.
“All I want to know is how I can overcome this and have a positive outcome,” she said. “Fear is the worst human emotion.”
Ms. Abramovic added that perhaps if the people attacking her really engaged with her work, they would see that their view was mistaken.
Thousands of people came to see her 2010 work “The Artist Is Present” at the Museum of Modern Art in New York, Ms. Abramovic said, often waiting hours for the opportunity to stare into her eyes. Many found the experience moving, she added.
She added that she would be willing to let the conspiracy theorists sit opposite her, too, if it would help them understand her work.
But even that might not help. “Their energy is driven by conspiracy theory,” she said. “They don’t have another theory to replace it.”