Don't sift through years of studies and find statistics just so you can believe you're educated on the subject. That's just a waste.
Jack clearly has a cause, but he won't convince me or any of my more sensible friends. This is not because my friends and I are gamers, but because Jack seems to be particularly aggressive in his approach, rabble rousing and such, tattling to politicians with time to kill... it's rot, and it's silly.
He's poking the animals with sticks.
I don't like him for his character, which I can tell from what I've read so far, is very condescending to gamers and game companies.
I certainly don't like how he picks on any old violent game and sways a bunch of bored people to get all riled about it. (I need not say again that violence and sex is natural, just avoided or hidden; we don't need someone on the rooftops screaming this at us.)
The only way anyone can make an educated decision on any issue like this is to go out and do your own studies, but few have the time, resources, or the will to do it.
It looks like people will just have to end up dealing with the Jacks and his blind opposition.
I honestly don't care. I just like to think I do because, hey, I get bored too.