Just an observation, it seems HN is more interested in topics semi-related to China than BLM or policing reform. I wonder if this reflects something about HN readers.
https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...
At most 10% of the HN community is in the Bay Area, last I ran the numbers.
People in the Bay Area are extremely aware of BLM, police reform, and related issues.
There's no reason to believe that interest in China-related topics is coming more from the Bay Area than elsewhere.
Interest in these topics is not about local demographics.
Also if you think tech isn't concered about "BLM" then you haven't visited a single tech website in the past two weeks. There are banners and calls for change everywhere...