Yup it must be the things. It always is best to focus on the things. It is existence of things that make people murderous. Citing that ultimate authoritative source "everyone knows" ;-).

Look at all the problems we've solved by focusing on the things misused: 1. Prohibition of alcohol 2. The war on drugs 3. Lawn darts

All of these raging success how can we argue with the notion that THIS TIME we'll ban the right guns and all murder will cease. Feel free to share your own list of successful prohibitions ;-)