Good question. This is about more than his girlfriend. Last year UNC had an incident where some middle eastern guy drove his car into a bunch of students. Then there was the OSU kid who blew himself up during the football game. Sometimes it's hard not to jump to conclusions during these incidents in a poast-9/11 world.
Press conference on Prager, spokesman said 2hr gap between 1st shooting reported and subsequent rampage. Maybe realizing he was gonna fry anyway he went back to take as many with him as possible? I’m skeptical of all reports since the ‘white guy in a van’ manhunt in the DC shootings.