Leviticus 19:28
You shall not make any cuttings in your flesh for the dead, nor tattoo any marks on you: I am the LORD.
This is an Old Testament command given to the Israelites. A lot of us Gentile Christians eat pork, wear mixed fibers, etc. The apostles did not include not getting a tattoo in Acts 15, but does that mean we should do it?
I hate tattoos personally. I think they are ugly, like scribbling graffiti on a beautiful building. Back when I was a single young man, if a young woman had a tattoo, that put her out of my consideration set as a potential girlfriend or marriage partner. Aesthetically, I do not like them, and it speaks to an individual's mentality, especially the louder tattoos. But, while I do not like then, I do not say people who got them are sinning. I was raised with a very anti-tattoo mindset as far as religious beliefs went. When I was a kid, Hell's Angel's got tattoos, mainly, along with a few people in the navy or special forces.
I spent a little time in Hawaii and I found out that some of the people there get tattoos for dead relatives. I noticed this verse mentions cuttings for the dead and tattoo marks.
Be that as it may, I do not see any evidence that tattoos make someone demon-possessed. The OP did not prove his case at all. If it were done in an actual pagan ceremony, I could see how it could lead to someone being demonized. But if a beverage in one culture is drunk as a part of a demon-worshipping ceremony, that doesn't mean that someone who drinks it in another culture is worshipping demons.
Again, I still do not like them and would discourage people from getting them. They were associated with pagan practice in scripture. I have this kind of out-spoken, tell-it-like-it-is relative who said she was thinking of getting a tattoo in Hebrew. I said, "Why don't you get them to tattoo that verse from Leviticus in Hebrew on you that says not to get any tattoos?"