I don't think the anti's really blame the guns themselves. They know that people are behind it. They just blame the fact that people have easy access to guns. They have a distorted view of life, where if people don't have access to firearms, all violent crimes will somehow stop.
If they could prove to me that there was no such thing as violent crime before the advent of firearms, then I might be inclined to believe them. Unfortunately, that is not the case. People will always kill other people. They will always rob, rape, maim, kidnap, etc. Whether they're using guns, swords, knives, brass knuckles, or what have you, people are the problem.