I have to read more about this when I get the chance.
It seems that everyone gets diagnosed with some neurological/psychological disorder or another these days, so it is hard to tell whether or not he actually had a.s.d. His facial expression in his photos betray complete disconnection, yet this could be the result of psychological disturbances. Even if he did have asperger's, which possibly exacerbated whatever other disorders he had, he is still responsible for what he did, plenty of us have no intention whatsoever of inflicting violence on others, and plenty of people with no neurological or psychiatric disorders have created misery (just remember similar incidents this year and the general condition of this world).
Either way, our first thoughts should be about the people that were massacred, including six year old victims who had their entire life ahead of them.