You are correct...it doesn’t pass the smell test.
Yeah, it's just...odd. As you'd expect a psychopathic crime to be. He didn't panic after the killing and gun down a cop ala Oswald, he got exponentially deadlier. My gut instinct is that the first two were for Honor, the dozens of others for Allah.
If I'm writing a novel, I have this guy as part of a cell that's supposed to hit universities. He came in undocumented (thus no fingerprints) and is living American Large the way Atta and the rest were, even gets involved with a girl...then she cheats on him and he does and honor killing. Knowing that the police will be on to him sooner or later, he puts Operation Phi Beta Jihad into action, gets whatever weapons and gear he had handy, kills as many as he can, and then and kills himself both to keep from being interrogated.
I'm sure the truth will be weirder than any fiction I can imagine.
My guess is the weapons stash was back at his apartment off campus. (which would account for the delay/hideout before his first class of the day)
An exceedingly plausible scenario, to me.
Thx.
Did you hear that they closed all of the schools in Virginia tomorrow?