You needn't use your real name, of course, but for HN to be a community, users need some identity for other users to relate to. Otherwise we may as well have no usernames and no community, and that would be a different kind of forum. https://hn.algolia.com/?sort=byDate&dateRange=all&type=comme...
If you are referring to against mainland China people on anti-immigration issue. It is quite normal as the citizens don't agree the government's policy on allowing mainland non-professionals to be HK citizens easily (500+ mainland Chinese people becoming HK citizens per day), statistically speaking more than 70% of them doesn't have a degree and is using government funding to survive every month (which is actually from HKers' tax) as I recall.
If your Conspiracy Theories are about COVID vaccinations, which many HKers believe that they want to wait for 1-2 years to make sure the long term side effect is minimal. I do think that is understandable given that there are quite some correlation of certain side issues (not causation)
[1]: https://www.tourism.gov.hk/en/tourism-statistics-2018.php
Why should we be afraid of China PR?
What? I see claims of Japanese racism everywhere on the internet. A load of people seem to think it's one of the most racist countries on earth.
Yet in my 5 years here, and as someone visibly foreign, I've never been treated differently from a local. If anything, being treated completely normally put a lot of pressure on me early on since the only thing holding me back was my own lack of language ability.