I'm sorry. I disagree with you. I don't think the OP was particularly gruesome. They were simply speculating about how Kelsey was murdered. There wasn't even graphic detail. You used graphic detail "teeth avulsed". They did not except speculating about what he did to get her body out of the house.
You bolded several words as being "gruesome" and having "no basis in reality. Including "kill", "hate", "anger" "good sized man", "blood".
Yeah. Sounds like murder to me.
You also bolded the word "pieces" but I think misconstrued what the poster meant, which didn't have to do with her body.
Sometimes I do think people go overboard wondering in graphic detail about what happened to victims and coming up with ever-increasingly more horrific experiences not based on any reasonable assumptions. (For example, in these scenarios children are typically always raped and/or buried alive, etc).
But I'm not seeing that here. The poster is wondering how he killed her which is a normal thing to wonder but they're not coming up with baseless, "gruesome" suggestions, that aren't based in reality, IMO. He was a big guy. He did kill her in one of the typical ways these people kill. He got her body out of the house.
I think you'd have a point if people were gleefully talking about graphic details of what someone goes through while dying or coming up with improbable manners of death not seen in these cases, like being fed to a wood chipper.
This was a horrible crime and it's natural to wonder what he did and discuss that to some degree on a crime sleuthing website, I think.