US riot - citizens who enjoy democratic freedom protested against republic/democratic government. protest got violent, government handled it.
Hong Kong riot - citizens who enjoy(ed) democratic freedom protested against encroaching dictatorship. protest was peaceful, but then turned violent when police faking as protestors started violence. protest got violent, government handled it (openly and in secret). The dictatorship increased its power at the end.
This is all about american interests and destabilizing china ir other countries.
I wonder what will happen in q few years. Will americans accept that another super power will dictate them what to do like the US currently does to their allies: europe cant build a pipeline to russia, in order to protect american interests in ukraine and poland. Europe cant use chinese hardware, while its proven that just a few years ago the americans listened to all communication of angela merkel, europe cant do business with the russians because they are sanctioned, nor with iran, etc...
This is a tiring argument. China has only 1 ally - North Korea. The rest of the countries in the proximity of China are adversarial and aligned with US - Japan, SK particularly. If Canada and Mexico were close allies of China, you betchya there would be a lot more going on along the east and west coast of US.
In fact, Japan and SK are counting on US to defend them. Does Canada and Mexico have such relationship with China? No. Instead, the US+Canada have NORAD.
I suggest some reading regarding military alliances: https://en.wikipedia.org/wiki/List_of_military_alliances
So it's the US's fault that China tried to impose an extradition law in HK? Because the USN ... had a port visit in Hong Kong? You know China approved that port visit, right?