If you're not colorblind, you may notice the rainbow progression of navlinks under the title. Then there's the choice to include pronouns as a special data item in the markdown, and the specific choice of "they/them" in the example, even though that's probably much rarer than the two more traditionally-expected choices. Then, of course, there's the affiliation with a Mastodon instance; we're all aware of the developer's politically-motivated choices and limits on federation with the main Mastodon instances.

Is "burning crosses" over-the-top? Yes, obviously. Does it say, "You're not the kind of social we have in mind," to a sizable portion of potential users? Yes again.