Seems that Americans have, collectively, decided that their own right to carry a gun (and all the concomitant knock-on effects of that) supercedes other people's children's rights to life. Because no-one ever believes "it" will happen to them until it's too late.

Stabbings like this are vanishingly rare in the UK (although there's been a spurt of 3 of them recently) and mass shootings are measured as 1 or 2 per year since the country, collectively, said "fuck that shit, get rid of the guns" when we had one in a school. One. Every other week [1] there's another mass shooting in the USA. Perhaps wandering around armed to the teeth isn't the flex you think it is.

And even given all of that, I regularly walk around with a pocket knife in the UK, and it's completely legal - because it's less than 3 inches long and non-locking. You know what ? I haven't come across a situation where a non-locking 3" pocket knife is insufficient for what I want to use a pocket knife for...

[1]: https://rockinst.org/gun-violence/mass-shooting-factsheet/