What is so special about Hong-Kong? It is a territorial dispute, it happens often in the world, and there are not protests and boycotts every time it happens.

Just look at the Wikipedia page here, it is quite long: https://en.wikipedia.org/wiki/List_of_territorial_disputes

And for Honk-Kong, we already know how it will end. Hong-Kong will become part of mainland China in 2047, that's the deal. That's unless China changes its mind, which is unlikely.

The way the US treats the Hong-Kong case is not "a freedom and civil rights issue". It is for Hongkongers, but for the US, it reeks of a proxy war. The US doesn't like China, but they can't fight directly, so instead, they support Hongkongers who oppose China.