this is again loaded language. the intent is to make things seem more severe than they were. the bombing of Nagasaki was a mass killing, shooting 4 people is a shooting with 4 victims, not a mass shooting.

Why are you so intent on the definition of "mass?" whether "mass" means 4 or 400, one "mass shooting" is one too many. Arguing about how many people are allowed to die in an incident before we do something about it does nothing to prevent this from happening.