Unless it can proved that a movie or video game is MORE responsible for a bullet-ridden corpse... [View all]
...than the weapon smoking in the shooter's hand, then NO, I don't think we need to regard the blame-the-culture-at-large idea floated by the NRA as anything but a diversionary tactic.
Fox News Host Calls Out "Hollywood's Violent Video Games" At NRA Event
Guns don't kill people, people kill people--so we've got a people problem? Well shit, we've been trying to fix people for thousands of years, and if you haven't noticed, we are the same violent, half-crazed, barely-civilized species we've always been. The only thing that's changed is that we don't carry clubs or swords anymore--we carry contraptions that can kill a kid on the other side of the street with an accidental flick of our finger.
And THAT'S where any thinking person would try to start with the fix. With the responsible handling and distribution of the weapons themselves, not with whatever's playing in your local multiplex or selling in your local GameStop.