There's 330 million people here. You, being not from here, only find out about what's exceptional, not what's normal. This case made the news because of how bad it is. It this was common, it wouldn't have made the news.
Lots of people are from many different places where this kind of shit never happens. Yet it keeps happening in America.
The instance might be exceptional, but the steady torrent of different varities of shit coming out of the USA is not exceptional. It's incredible.
And don't me wrong, I'm certain there are millions of good people in the USA. But the assholes are in the ascendancy. Obviously.
Stand up, or get flushed down the shitter.