Trumpism has a very clear culture, using that definition.
But it seems like you're not using that definition. Perhaps you're using the second one in Merriam-Webster?
> enlightenment and excellence of taste acquired by intellectual and aesthetic training
People self-identifying as this type of "cultured" is just another example of the smugness I'm complaining about. There's also not much to argue about here, there's no way to falsify such a claim, it's just self-annointed "enlightenment and excellence". Some folks on Bluesky define "enlightenment and excellence" in ways that align with their attributes, some folks on X/Twitter define it differently to align with theirs. And they're all smug about it.