Check out this essay from Cory Doctorow, the guy who coined the word. https://pluralistic.net/2023/01/21/potemkin-ai/

Yeah, since the only true diversity is which particular flavour of a tankie you are.

I write about principles of free software, and you interpret that as endorsing racist comments?

If you actually cared about diversity, you’d know that many English slurs happen to be the same as other non-offensive non-English words; your particular narrow linguistic and cultural viewpoint isn’t the only one that’s valid.

Well, that’s just not the case. Lemmy’s devs have always been highly ideological. The case in point here is their handling of the slur filter.

The basic guiding principle of GPL software has always been freedom. Free software has always been explicitly political, but when you put out free code, you have to accept that it might be used by people you don’t like. Adding DRM, such as the slur filter, is against the freedom and openness of the free software, even if the DRM is so half-assed as a slur filter that any half-competent dev could easily remove.

Yeah, lemmy part of fediverse is full of tankies. There is even a pretty active tankie instance over lemmygrad.ml.