So their plan to deescalate a kid making threats is to expel the kid for a year (or forever), and then also taking away their license (for a year)?
I’m sure “ruining” a kids life instead of listening to them and getting them help wouldn’t speed up an unstable kids time-table for revenge at all. Probably best to not even try and understand why a kid is making the threat in the first place, that might require addressing issues and make people uncomfortable.