well, aside from alleged riots there have been actual ones and those have unfortunate effect of making it easier to dismiss the cause
Would that Americans use the term more accurately.
https://en.wikipedia.org/wiki/George_Floyd_protests says $1-2B in damage and more than 19 deaths.
https://www.theguardian.com/world/2020/oct/31/americans-kill... says 25 deaths.
I honestly don't even know what you're referring to. There have been tragedies related collapses of stadiums and trampling due to poor crowd control.
But that is not even remotely similar to what we're talking about.