I wasn't aware of his political views, especially more recent statements he's made such as the linked tweet above/below.
He was always better known as a writer than as a developer - his most significant FOSS contributions were probably fetchmail prior to 2003, and the ill-fated CML2 kernel config system around 2001. I'm not aware of anything of note that he's produced since.
It's one of the reasons this current tweet is so surprising - he's moaning about "drama and politics", "negative useful work", and "shit-stirrers" "who are more annoying to work with than [their] contributions justify", but doesn't seem to realise that all of those complaints could have been made more strongly still about ESR himself, especially when he was in his pomp.
Over the last 15 years he seems to have shifted further and further into the MAGA spectrum, increasingly exhibiting outright racist views. It might be age, it might be the evolution of the political debate over there, but the fact is that he's utterly unpresentable now, and I'm surprised anyone still listens to what he's basically just an old racist uncle yelling at everyone.
Some politics are not within the realm of what is considered acceptable.