I found some interesting YouTube comments of two people discussing their opinions on violence and video games:
I'm not sure if I completely agree or not simply because video games affect people in different ways. I agree that humans are animals and violence comes naturally when threatened or protecting someone, etc. But I think that it depends on the person themselves whether a video affects them or not. If a violent person plays a violent game, it could stop them being violent towards others, or cause them to be violent towards others - try out violent things from the game on other people - I believe that anyone can be violent, but violent video games are not a direct cause of violence. That's just a parents excuse for their child behaving badly, blame it on the video game not themselves.