Listen, I'm genuinely interested in how you and others justify the destiny of Hong Kong. So we're in agreement that democracy is better, and for example there's a very tenuous argument that the violence the West used in Iraq was necessitated by an existing autocratic regime. However the violence used by the UK to gain HK was utterly unprompted and motivated purely by economic greed. Democracy may well be the better choice for HK, but in what way does it deserve it? How can any argument in support of HK's democracy not also justify absolute violence against all other currently non-democratic states?
It's unfortunate, but HK didn't come across democracy by its own struggle in the way most countries did. Such foundations are just inherently unstable, how can it possibly be any other way?