The "occult" aspects of these murders may point to a possible motive. Sure, the suspect could have been in a jealous rage and simply lashed out, but we have to remember the demented and violent sub-culture he was deeply immersed in
since he was ten years old, and there is always the possibility these killings were planned in advance in some way. I hope LE will cover all the bases here in getting a full picture of what happened and why.
There were reports earlier that satanic symbols were found at the murder scene. I know that some on this board consider it silly to talk about this aspect of the case, but really, it appears to be front and center in any discussion of possible motives.
You'd have to be naive to eliminate offhand the topic. Whether one believes these activities to be childish or silly is not the point. The suspect probably was dead serious about his beliefs in this arena. The people involved in this "horrorcore" cult also seem pretty serious about their pursuits.
The "Son of Sam" killer, David Berkowitz, was unapologetic about his satanic mission to kill all those people.
The "Night Stalker", Richard Ramirez, who terrorized Los Angeles back in the early 1980's, was a professed Satanist and proud of it. At his trial he showed off the pentagram he had tattooed on his hand.
There have been many other cases through the centuries of people who have claimed to kill for the devil. I'm not saying it's common, only that it can be a real motive in the mind of a killer. We'll see how this whole thing plays out, but I wouldn't be shocked to find we have a murderer here with no regrets about what he did.