Glitterface Twinkleshine was only able to kill so many children because they were concentrated in a small area by a STATE MANDATED AND FUNDED elementary school system.
Let's ban target concentration facilities.
It's for the children.
Also very likely that the school was a union shop. We can say that unions caused this too, can't we? Unions are well known for attracting violence.
You know who else was into concentration facilities? Hitler!