Like with everything else, Trump being elected is a pivotal moment that broke their minds.

Before ~2015 wikipedia was left-leaning, but neutral in tone; "just the facts", but without some "problematic" facts. After for sure 2016 they dropped the neutral tone and now it's only the negative facts about non-lefties and the writing uses emotional tones.

So there was a huge shift around that time.

Compare after-announcing Trump 2015 to Current Trump. In the very long 2015 article there's nothing negative outside the short Controversies section at the very end (the only purposeful negative is listing bankruptcies without mentioning total number of businesses). The current one there is nothing positive anywhere in the article. For instance securing financing for black colleges and black unemployment isn't even mentioned at all - because they're a positive for him.

I don't think I've ever read Trump's wikipedia before but it's actually sickening to see the difference between these two. I knew wikipedia was bad now, but I hadn't realized it was this bad.