I find it ironic how people will go for the "easiest target" in terms of aspects to these situations. Its easy enough to just point the finger at one thing and call it a day. Kinda like how these crazed killers will go after easy targets like schools.
It's not really hard to grasp the simple concept that such crimes are easy to commit when you have an abundance of deadly weaponry. Couple that with poor mental health and you have a problem.
It obviously goes beyond guns, and I totally agree with that point, but is the US really fit to continue to dump more into circulation?