That is a stupid internet myth that's been perpetuated since 1999. It's been debunked by the ASPCA.
Here is the thing, where I live, people practice a version of Voudou called Santaria, and every now and then someone will find a bag of decapitated chickens or dead goats in a canal. So far killing farm animals is as far as it's gone, but it is unnerving that this practice is happening and the law enforcement aren't really doing anything to stop it. It's one of those "culturally sensitive" things. Whatever.
Manson IS a Priest in the "Church of Satan" of California. Source:
https://www.crfashionbook.com/mens/a30297235/marilyn-manson-reverend-anton-lavey/
Manson DOES have Satanic tattoos and esoteric tattoos, sigals on his person.
Manson DOES show narcissistic personality disorder
However, on the same side of the coin being devils advocate here, Manson has been abused himself. He has a history of dysfunction, and struggles with addictions. Was Jesus a magician? Some might think that, but Jesus himself said "satan won't cast out demons in his own name" go fig. Even Jesus himself had to deal with that mislabeling. I also know that there are attention seeking people who will do just about anything to draw attention to themselves and to make themselves into the victim for some type of monetary reward/compensation. YET, the difference here is that we have women from across the world, from different walks and stages of life who are coming forward and accusing him of very similar MO's. We also have television/media groups disowning him because of this, so I think there is some actual "weight" to these allegations that has not been released to the public due to the legal nature of it.
Manson is living up to his namesake.