How often have we heard the phrase, "guns don't kill people, people kill people?" It's a piece of NRA propaganda that's been repeated so often over the decades that many people now consider it true without truly thinking about it. It demonstrates the power of marketing, especially the power of marketing over decades.
At the time of the Newtown shooting, a similar massacre occurred in China. In China, the criminal used a knife. In Newtown, the criminal used a Bushmaster AR-15 assault rifle. In The Newtown attack, 28 people died. In China, no one died.
In both cases, the criminal motivate was to kill as many children as possible. The main differences were the weapons used and the fatalities caused on one side. Knives are slow weapons that require a great deal of effort to kill someone. Guns kill with the quick pull of a trigger. Those deaths in Newtown were caused by the use of a gun.
Yes, guns DO kill people.
As so often is the case with conservative propaganda, the idea that "guns don't kill people, people kill people" is completely wrong and backwards. Of course guns kill people. That's why people own guns.
In this, as in most cases, conservatives use marketing to push propaganda which is the opposite of the truth.