I have a background in sociology and urban planning. It's very clear that DHH is not an expert on politics. His blog posts demonstrate a very elementary understanding of the topics he covers. He doesn't even understand statistics.
Any specific examples? I am/was out of the loop on this and had to Google "DHH politics" to know what people are talking about.
If you check now using current sources the British-born population is still around 59% the only thing that has changed is that fewer people identify themselves on the census as 'White British' which has a host of reasons around it. So he took a misleading statistic, interpreted it incorrectly and then built some kind of nostalgic story around it to support what was essentially an excuse to support far-right thugs protesting.
The one for me is spotting the Baader-Meinhof effect, of which this is an unfortunately strong example.
But if someone misrepresents deliberately on a topic of polarising importance, why would you spend any time listening to them on any other topic?
I would (still) listen to him if I did not know he wrote stupid wrong things on other topics in bad faith.
DHH or anyone else spouting opinions on social media is hardly qualified to be setting policies for countries. Social media is also hardly the place to have any sort of debate on those topics.