It seems like you willfully misunderstood my argument, as talking about journalists shooting kids is some obvious caricature.
Society is held together by people's values and individual adherence to shared rules - aka culture. Kids, like everyone else (eg cops), are acting out cultural norms, being mostly defined by mass media.
Entertainment media mostly consists of easy-to-write fight scenes where the main characters dispose of some endless supply of nameless "bad guys". A few hits or shots, that one is gone, move on to the next one. No scenes showing henchman #17 hugging his kids goodbye that morning, or henchman #31's parents grieving. Just purely transactional force-of-will violence - sound familiar?
Furthermore, news media then glorifies shooting events when they do happen, showering the perpetrator with attention and making sure they go down in infamy - it's actually a quite precocious way to get one's 15 minutes of fame.
And of course there's that other uncomfortable issue of why school environments cause kids to want to kill their peers in the first place!
But there's no straightforward approaches to those, and they're held in place by entrenched incentives (lazy writing, clickbait advertising, ass-covering school administrators), while the people speaking up for the inanimate objects are easy to write off.