You cannot use overall homicide rates as an indicator for mass shootings.

Good think the source is specifically mass shootings?

And yes you can treat one countries overall homicide rates as relevant to anothers… Just because you lower gun related incidents doesn’t mean that it actually affected much of anything when those numbers simply transfer to other forms of homicide. Rates in general have been going down overtime in all “western” countries… at effectively the same rates… Gun laws have not made any significant effect as far as I’ve ever seen.

than someone just running into a school killing two dozen kids

Except EVERY source cited against anything I’ve ever said has ALWAYS been “well theres 600+ mass shootings in the USA this year”… when there’s like 20 that are actually school related. And yeah 20 is bad and sad… but when other countries have 1 or 2 and we’re 10x+ bigger than those countries… it’s literally on PAR per capita.