He was a college grad student!!! College professors are overwhelmingly liberal.
That means that he had been through a process of liberal indoctrination including not only his completed grad school classes, but also four years of undergraduate course work. Plus thirteen years (k-12) of indoctrination by the NEA union thug teachers.
Clearly, if there is any knee jerk blaming that might be justified, it would be to blame this on the left.
What did all those years of liberal indoctrination do to cause this event?