So, you're saying that we've had a series of 286 tragic, coincidental one-off mass shootings during the first 8 months of the year in this country, because each one was about the shooter. In Great Britain, where people are just as ornery as Americans, there have been 3 mass shootings since 2000.
The difference is the gun laws.
We can't make sure that all people are content and mentally healthy all the time, but we can make sure that when people snap, guns are less likely to be on their hips or in their handbags. Canada is a good example to look to for this. People own guns, as they do here, but there is enough of a hedging around the way the guns are registered and restricted that they don't have mass shootings multiple times a week.
This is a classic behavioral health problem. It's just like cigarettes, or seatbelts.