Edit: Rats; this doesn’t belong in Factual questions. I’ve reported it to be moved.
I believe the line of thinking is that the students in the school were terrified as part of the commission of this crime.
What prevents this law from being expanded to subsequent events that have an affect on the psyche of those not physically harmed?
It seems that we can apply the terrorism charge to people who drive through parades, or demonstrations that turn violent, or armed robberies…
It seems that its possible, that any act where people are legitimately frightened can result in a terrorism charge.