Yeah. Hypotheticals. That’s a losing argument.
But I’ll even play the game briefly just to show you the ludicrousness of it.
The columbine shooters’ web pages were filled with lots of fan posts about professional wrestling and grand theft auto. They were big fans of both. They also had a thing for trench coats.
You are in effect arguing that WWE, Rockstar Games and London Fog fashion are responsible for Columbine. Which, btw is what some people tried to argue when it happened.
And it was stupid then too.