Xenosatanism is a mostly online offshoot of Satanism that encourages the suffering of children and animals. They go on Discord, Instagram, Tiktok, wherever they can reach kids online and manipulate them via emotional abuse and sextortion to hurt themselves, kill their pets and of course kill themselves. They treat successful acts of horrific abuse as a sick badge of honor. They're proud of what they do because in their mind it pleases their lord Satan and they think it gives them some kind of special power. Of course they support and participate in CSAM trading.
They're also no stranger to openly threatening raping then killing people and their pets.
The vast majority of Satanists are nothing like this because they highly value the individual and individualism. Consent is very important to mainstream Satanic ideology because they believe that every individual person is their own God. To rape a God would be the highest form of blasphemy.
There are Satanists who only believe in one God, that being the God in the bible, but they still highly value individualism and the ability for one to make their own choices and decide their own destiny. This includes the ability to consent.
This care extends beyond humans, a lot of satanists are Vegetarian or Vegan because animals cannot consent to be eaten or consumed. For this reason, they actually don't sacrifice animals contrary to popular belief.
My personal theory as to why people are attracted to Xenosatanism is a combination of mainly 2 elements.
Abusers ultimately want power over their victims, we all know that's why they abuse. People who experience abuse in childhood are the most likely to abuse others when they get older because their environment reinforced the abuse and they grow up hearing rationalizations of their abuse from their abuser. Considering the fact that these people want to gain unearthly Satanic power, they probably want it because they feel powerless.
These people might be aggressively celebrating harm because they're proud of themselves for (in their perspective) turning the tables and becoming the abuser. It's normal for them to say that victims are "Weak", "Stupid" etc and so they "Deserve it" which doesn't make sense to any rational person. If you grew up being abused and hearing such vile rationalizations... It might just make sense to you.
Not every victim grows up to be an abuser and they certainly don't jump right into an abusive cult. It's just hard to comprehend and imagine the psychological framework of a loud and proud vile abuser who has not themselves been horribly abused.
If you're at all familiar with mainstream American culture in the 90's or Satanism in general you already know what I'm referring to so I'm not going to bother explaining what this is. The thing is, it never really left our culture. It just became a conservative Christian talking point, mainly from fucking Evangelical televangelists because of course it did. Anytime Evangelicals have a problem with literally anyone for any reason they are accused of worshipping Satan.
The problem is that this created a mythos seperate from reality convincing everyone that Satanism is all about rape and blood sacrifice in a desperate bid for power. This is a trope still portrayed in media so of course, people who want to rape and murder are drawn to "the evil rape and murder religion" because they think it was made for them.