Hard to say the teacher intended to censure him.
He did mention Virginia Tech. We don’t know the text of the oral presentation.
Considering a kid’s unfamiliarity with the language, the influence of pop culture cadences, and nervousness often perceived as aggression, the talk might have seemed threatening.
The prof would have been obliged to give somebody a heads up.
It looks like the cops over-reacted.
You forgot the /sarc thing. Without it some casual readers might actually believe your parody of liberal mindrot was posted seriously.