As far as I can tell, whoever draw that is just being an edgelord for the sake of it. They have another account still up on X (
@KneerAccount [
A]) and it contains a similar set of school shooter pictures but from an opposite point of view, with the pooner as the perpetrator and a SJW school as the target, as well as other assorted retarded edgy drawings. The few posts it has seem to be contrarian for the sake of it, aiming to offend whoever they are replying to at the time and constantly displaying contradictory ideologies without much rhyme or reason. Probably not ever a troon, but who the fucks knows at this point.
I refuse to try to make sense of it, looks like classic modern terminally-online behaviour.