I have no problem with any of this, really, other than the NRA's weaselly little attempt to shift public attention. Let them talk to experts, let them do research. That's good, in my opinion, as long as it's done objectively.
At some point, however, someone is going to have to point out that the overwhelming majority of children playing violent videogames are getting them from their parents. Unless they're willing to discuss mass censorship, which I hope would never fly in this country, then they're going to have to pin most of the responsibility on parents.