system
A chat on subreddit /r/NoStupidQuestions
human
I think it has more to do with the culture / education. See third world countries with easy access to weapons still none of this shit happens.
gpt
I hear your point, culture and education certainly play a significant role in shootings, but to believe that they're more important than people easily getting a gun seems obtuse.    

 The ease of access to gun ownership in the developing world is nowhere close to to the US fyi.