I thought it for the motive because none of these would've happened if Virginia didn't happen.
Dunno about this. In germany something like this happened 2002 already. The guy killed 12 teachers, one secretary, two pupils and one police officer.
Of course not many people know about it cause it was "just" in germany.
If something in america happens, everyone is talking about it.
Anyway, the only word i find for this situation is "sick". It makes me speechless.