While we game researchers are frustrated with how games are used to explain everything, psychologists have to face "experts" telling the media this and that about the wannabe, diagnosing him wildly. The Norwegian psychologist Kristine Tofte is as sick of this as I am of the "too much gaming" angle, and writes an extremely good post about it.
Her post is in Norwegian, but as a super-quick resume, she asks colleagues to quit diagnosing him from what is written in the media, and to remember that so far as she knows, nobody have acted exactly like this, ever, in history. It is an anomaly, and we can't say it's typical for anybody (gamers, sociopaths or trained soldiers), because it is a unique event.
I find this extremely important. We do not know and can not yet start to understand the why of this event.
Thank you, Kristine Tofte.