I dont know seventy percent of the other murders were successful so what are you getting at. Is it easier to kill with a gun? Of course. But what if lanza would have planted a couple of bombs? Stabbing is not the only way to kill people. I dont know what goes through the guys heads and where they get their thrill from. If someone plans a mass killing it usually goes with a lot of preplanning (hence the gun free zones chosen). It doesnt take a lot to know that knives dont take you very far. Theyd figure something else out.
As terrible as it is, I dont think the mass killings are whats bringing up o the ur numbers so high. For mass shooters one or two armed security guards at public places would do trick. I think that its inner city gang violence mainly. All other violence is what Im afraid of and thats why I want my gun.