> That's probably linked to the increasing polarisation in the US,

Not really. The phenomenon exists in other languages Wikipedias. I think it is related to the fact that NGOs that "shape" political discourse and politicians have become "sensible" to the text in Wikipedia pages.

It is always good, when you read Wikipedia, to "follow the money", i.e. look at the sources, see if they make sense.

In the last 5 years, a lot of online platforms, HN also, are used by state actors to spread propaganda and Wikipedia is perfect for that because it presents itself as a "neutral" source.