I don't even know if I can read all of this, it just has me worried about the mental state of the author talking about mass murder shootings and cannibalism among other things.
there's a lot of familiar drawings in pixiv with that kind of gorey shit. i think its similar to how a lolicon would draw hentai with lolis in it to keep the urge from doing it real life, only this time its about cutting up and torturing said loli.
honestly, im kinda disturbed by it, and im worried about the author as well.
imagining about cutting up or shooting someone is okay, because its only imaginary and we, humans are curious like that, but its also in our nature to feel perturbed or maybe scared to know there is a random person who would be thinking about killing you in a very painful way.