I get the argument against guns, though.
While there are as many ways to kill people as one's imagination can dream up......home made bombs could do a lot a damage quickly, for instance. The issue is how "quickly" the death/injury total can mount with semi-autos with large magazines.

As a side note, I noticed in one article (maybe more) that the teachers had their students huddle in a corner........

Sounds like some proper training on how to minimize damage is necessary......gathering in tight groups is NOT how to keep kids safe.