I think a big part of this really is the overarching narrative taken on by the big players in government. The President has said "If we can save even one child, we must do everything we can". People are willing to look at throwing ANY freedom or rights they have but don't exercise regularly under that umbrella. People who don't play video games (albeit an increasingly smaller number) or especially those who play only "Family Friendly" games are very willing to talk about banning violent games because it doesn't affect them, and we have to "Just do SOMETHING" right? It's way easier to use Video Games, or Assault Weapons, or Comic books or the Opera as a scapegoat than to take a look at the underlying issues of a broken mental health system and a culture that ostracizes individuals to the point of breaking in some cases.
That's whats really scary about this whole discussion. It doesn't matter how vague the link is, if you show there is any link at all to the tragedies we've seen(real or imagined, doesn't matter when you have the media behind you) you can stir the masses into demanding the government take away individual rights.