And it reminds me of a thought I had in the midst of the madness: that is, we invade countries for apparently no reason, maiming thousands of our own troops and killing hundreds of thousands of innocent civilians. We celebrate violence in movies, music, TV, and games. We have been in a pressure-cooker since 9/11, with a constant, ever-present anxiety about terrorism. We have had a tanked economy for nearly 5 years with massive unemployment and near-constant financial stress for many.
On top of all of this, we have a media that lives for opportunities to incite fear and endlessly highlight the actions of the worst human beings on the planet.
Then, when someone loses it, everyone looks around and asks "what's the matter with that guy?"
It can certainly be argued that FPSes are a drop in the bucket, reflection of society, etc. as some comments on this thread have stated. But, I don't blame the OP for not wanting to risk being a contributor to the problem.
It starts with one.