Some American people don't know that US misfortunes are celebrated elsewhere. 911 became a holiday in some regions. And if American empire falls down, I feel like at least half of the world gonna celebrate that.
Name one country that made September 11 a public holiday.
A lot of "celebrated misfortune" is a byproduct of arrogance and the pretense that the US is "smarter" (witness how often the US likes to play "world police"... and how often it correlates to US self-interest. There's nothing wrong with self-interest, but no-one's buying some noble "world police" bullshit when it only seems to happen when the US has something to gain). Certainly not limited to, but also certainly amplified hugely by the present administration.
Its worth it to see the orange bozo act up.