The Chinese were obviously always opposed to British imperalism and it was a major victory to finally get HK back, including in HK, and even acknowledged in Taiwan. There is a large body of quite nationalistic and anti-European/British films in HK cinema from British times.
However, this does not mean that there is no domestic politics with pro and anti communist party, but daily life hasn't changed in HK except from the larger influx of "mainlanders".
The narrative on HK in the West is simplistic and, frankly a little racist. European imperialism and colonialism has long been rejected except somehow for the so great thing it did in HK, conveniently forgetting that the British never had any democracy in HK and acquired HK by pretty nasty means.
It was the same thing with British Overseas passports. Britain wanted to issue full passports to Hong Kong citiezens but couldn't because China was heavily against it and so a compromise was sort.
Britain wouldn't make Hong Kong a full democracy and China would stick to one country two systems. That worked well until one side broke its promise.
The article is literally about what happens when you go around flagging too hard that you're opposing China's crackdown.
People are generally not super closed nor open about it, although some individuals were more closed about it. Most seemed honest when asked about it, but again, YMMV.
Of course this guy isn't sone factory worker but a CEO. He met with Mike Pence, Pompey and Bolton, i.e. the West so he's "pro democracy".
ICE is in my city pulling people out of their cars, then releasing them with no charges days later. Wish there was some democracy in this country.