In America, sometimes people try to shoot a bunch of other people. Invariably, they are stopped. And the liberal media and anti-gunners try to increase the emotional impact of these tragedies in any way possible. One of those ways is to hammer on the use of the word "mass" - like you have.
But in communist countries, there have been true mass killings. Not thousands, or hundreds of thousands, but millions and millions of people killed. In fact, over a hundred million people killed. Those are true "mass" killings.
So when some "observer" like you describes and emphasizes a multiple shooting as a "mass killing," you are knowingly and deliberately trying to create an equivalency comparison with the genuine communist "mass killings" of millions of people.
And to help this comparison, you don't contrast the people who die in a multiple shooting with the hundred million gun owners in the U.S. who did not participate in that shooting, or the two million people each year who use guns to warn off a threat of physical violence without ever firing a shot.
So what's my point? Simply that you aren't anywhere near neutral, and you aren't a mere observer of statistics. That you have a very devious and sinister agenda - to play with words and concepts to try to poison people's understanding of their "culture" and "society," and thereby get a free and good people to think of themselves as the moral equivalents of mass murdering communists.
So to me, you not only slander peaceful, sane, gun-owning Americans, and endanger millions who are safe from threat each year because of their gun ownership, but you also slander and violate the memory of over a hundred million people who were victims of genuine mass killings.
That's just my way of saying that my "we" is not your "we."
But in communist countries, there have been true mass killings. Not thousands, or hundreds of thousands, but millions and millions of people killed. In fact, over a hundred million people killed. Those are true "mass" killings.
There are different categories and kinds of killings. There are killings for hire, killings during crimes committed for other reasons, there are killings by the Islamic terrorists, and there are killings in war and also there are killings by dictators and despots who can kill many more than any citizen or even those Islamic terrorists have done.
But, in this case (when using the terminology "mass killings" in America), this is an instance of the kind of killings in which they are done by people in this country killing other people in a public setting. Those are the ones which are referred to as "mass killings" (and/or public killings). That's the kind where someone ends up killing people they may have known (worked with or associated with or related to) and also others in the public right along with them.
We're all very familiar with this kind of "mass killing" in America, in public with strangers and/or some who may be known by the perpetrator[s]. We've seen it enough times in the last few decades...