The West needs to realize Hong Kong is a part of China, that was leased to the UK for 100 years

The West has no more say in it than China has a say in Catalonia or Scotland independence, Texas or California secession. Or their governing models

https://en.wikipedia.org/wiki/Handover_of_Hong_Kong

To the bigger question, since world border defining wars have become an historic unacceptable concept, how much power should be given to smaller subgroups into shaping their own, and the larger group, policy and borders