@joseph, it's really hard to know how to even respond to something like this. The thing that scares me is that he is probably NOT a "remote isolated case." Right now, there are probably people walking around at a high school near you with that same mindset.
I guess society scares me in the sense that we have arrived at this surreal place where there is a HUGE disconnect between "having thoughts of something" and the fact that carrying through on such thoughts actually has consequences. I'm loath to call the Video Game Effect... but it's starting to feel that way.