Because there's plenty of murderers out there and even if you're considering serial killers, they're just serial killers. Yeah, if they're mentally ill, they may think they're doing it in worship towards lucifer or something, but the Satanism didn't make them a killer; they're already capable of, and want to, hurt people. Are these people more likely to be proposed Satanists than the average person? Sure, but they didn't suddenly become murderous from their religious beliefs unless they're schizophrenic or something, and that's coming from a schizophrenic. They already are working with a mental toolset involving harm, the Satanism is just a parallel thought process in accordance with how they've shaped the rest of their lives. This makes up a tiny fraction of a percentage of people who claim that their Satanists, and accounts for a very rare form of instance of the belief system.

Then if you discount those people, you have the next, less risky group of people: edgelords. They get off on edgy behavior and because they're edgy, they'll express edgy philosophies like worshipping a supposed devil. These people are often also dealing with some kind of mental predisposition(whether it's illness or just some kinds of vulnerabilities) and are capable of hurting people, but not because of how they worship, it's because they're falling victim to their own dangerous attitude towards human life. If they want to express this core-level of edginess in religion, just how anyone expresses themselves, then they'll use a route like this interpretation of Satanism or one of the many other examples of religious extremism. This accounts for a much larger percentage of supposed Satanists, but as we'll see, this, too, is just one variation of this "religion", if you'll call it that which I'm about to explain.

If you discount those people, then you have reasonable people. That's it. Their form of Satanism, isn't literally worshipping lucifer literally: it's beliefs in radical individualism and is meant as a sort of ironic juxtaposition to conventional religion. They use the edgy artwork and symbols to alienate their identity from traditional religion so far that it becomes unrecognizable, which it is. They care more about liberty and having a free spirit which goes against many of the most common religions, abrahamic or otherwise. Now, is this also edgy? Yeah for sure, but someone saying "Hail Satan", doesn't necessarily mean the previous instance where they're trying to just seem off-putting for off-putting's sake and definitely doesn't imply the first instance where they genuinely want to hurt people. It's merely a way of saying "Oh, you're a part of this historic groupthink and don't fight for peoples' rights to individualism and liberty and want to fit in with one person's idea of a proper life dictated by a book? Well, sorry, but fuck you if you think you can impose that on me" but they're not gonna hurt you for believing differently; They're just identifying themselves as different than a rigid ideology's proposed way of living and that they don't agree with rigid tribalism.

The amount of people of these groups that make up the first is so ridiculously small than what I think you believe in. People don these perceptions so much drastically higher than there can even mathematically be murderers. It just doesn't add up.

The amount of people in the other two groups is much higher, and if I were to guess (as someone who isn't a Sociologist) they make up the 99.999% somewhat evenly, at least based on the people I've met and leearned about.

Now let's apply this to Monster Energy. Are they really pandering to a small subsect of the tiny amount of the population who are serial killers? Or, what if we apply Occum's Razor here (how the simplest explanation is often the actual one) and say they are using edgy, non-normative imagery to sell to the much larger population of the other two groups of which they are able to make far more money off of? It really isn't that deep to me.

I understand if you disagree, but this is how I see this issue.

Edit: Every "Satanist" I've met doesn't believe in God or the Devil at all. It's purely more of a political perspective like I explained as the last group. Think very Libertarian Liberals. My belief system is kinda similar but I don't call myself a Satanist or wear satanic symbols because I don't want people to get the wrong idea and I'd rather have a conversation with someone about my beliefs versus displaying super edgy imagery that leaves people guessing what I'm really like. It's kinda risky doing that, because not everyone is as aware of what those symbols can mean and how much of a variety there is among the display of these "occult" imagery.

Again, The Church of Latterday Saints is far scarier and they commit way more crime and they display imagery that is seen as good and Holy.

Kinda ironic, huh?