Another School Shooting in the US

[Thryleon]

I did some work for a expensive religious college and while the teachers were not armed they had security on the private school bus that were, the entrance security staff were also armed.
They were concerned about kidnapping's and terrorism ....

Armed security staff is a very different proposition than a teacher having a weapon.

They aren't interacting with students unless they pose a security issue and even so, they deal with them once and move on.

There is a different dynamic once an established relationship is involved whilst security only have to be an authority/police officer of sorts.