How many people actually know how HK came into being? That the supposedly democratic state of Britain who had already violently colonised India, used Indian land and serfs to grow 1000s of tons of Opium to keep Chinese people addicted and thus in sustainable trade. Queen Victoria ignored a letter from China exhorting her to stop. When Britain didn't stop, China took it into their own hands, destroying all the imported Opium they could find. Britain took this as destroying their "property" and thus went to war with them, easily winning and requiring the handing over of the port of Hong Kong so the trade would not be impeded again.
I know that was over 150 years ago now, but surely that has to be taken into account? If you don't think that's relevant to today's innocent HK'ers, then at least we have to realise that the handing over of HK was a defining factor in the ultimate end of the Qing dynasty, the closing of over 2000 years of China's political tradition and precipitating the radical changes that thrust China onto the world stage as we see it today.
I support the rights of all people to self determination. But HK is not Taiwan, it didn't naturally come to its anti-CCP ideology through an organic, internal and independent process. In fact, somewhat ironically, it came to it precisely because of an unaccountable, authoritarian regime, with no other agenda but self interest.