It all comes down to the parents aside from the random uncontrollable events.
All the violent video games and movies in the world won’t mean a thing if the parents have control of the home. Even better if the parents have firm control of the schooling.
My grandson play a lot of games, and some are violent war games. The difference is, they were raised in Church and know right from wrong.
I hear the military wants the game players, as they are more agile and perceptive to surroundings & problem solving.
Parenting is the key.