Crazy, you would think the US was a war-zone with all these guns and angry, impulsive people running around!
On a more serious note, this "study" is bullshit. They included justified homocides in their numbers for Christ's sake, that includes people justifiably killed by police officers.
It's a good sign though, the actual numbers don't support gun control so now gun control advocates are going for the angle of "gun owners are crazies just waiting to kill someone over nothing!" Keep grasping kiddies!