So how do we define and classify people who go on murderous rampages?

Bluegrass Pundit asks this important question:  American Psychiatric Association Ditches “Asperger’s syndrome.” Sandy Hook Shooter to be Reclassified as a Nut Job?

That is a profound question, but one that has already been answered by that cultural prophet Chris Rock:

And The Belmont Club also noted the connection with these shooters and race...  While random violence and mayhem is much more common in poor Black neighborhoods, these rare mass shooting incidents seem to be limited to mostly Whites (and occasionally by an Asian).

Update:
There are self appointed pundits who are essentially crazy!