That certain people were prone to act faster than others when provoked provides no explanation. Kids are exposed many other examples of violence more threatening to their development than video games. People that have fired guns know what I'm talking about. Fire a gun someday, and you'll see it's not that easy. Lost in all the arguments is parental responsibility.
Every kid is different.
My sister and I turned out fine, while my brother, on the other hand, has a reckless attitude. We all need different nurturing. In many cases, all kids need is some attention at home. Values start at the dinner table. It is not surprising our kids turn psychotic when a black, 21-inch box plays mom and dad.