https://en.wikipedia.org/wiki/List_of_attacks_related_to_pri...
So much for "this is the only country where this happens".
Granted, some of these are "school stabbings" or "school bombings" or "school throwing kids out of a window", but the death tolls appear to be of similar magnitude. There are exceptions (e.g., Uvalde, where the death toll had more to do with police cowardice than choice of weapon).
The problem here isn't "guy has a gun", the problem is "guy wants to kill a bunch of people". Until the real problem is acknowledged, nothing is going to change.