Listen, this is a place to discuss Grossman’s thesis. I’m sorry you feel threatened by it.
And no, Grossman ain’t saying that Stalin, Hitler, Mao or Pot used video-games to train their killers, okay?
Your contention is that animals don't want to kill each other naturally. You said that. It is demonstrably false.
Grossman's theory is flatulance, until proved by facts.
Facts tend to disprove Grossman's theory.
I am not threatened by it, because I recognize nature, and don't try to sugar-coat it.
Grossman is discredited until he draws a statistical link between video games and murders. And even if he does, you can't get around the 1st Amendment.
You still didn't define exactly what a 'massacre' is.