The fact that you don’t know and people offer dozens of credible guesses should probably tell you the problem is widespread.
That was just a single incident, being noticed by far-right weirdos thankfully not being a regular thing for me. But I can imagine it would get old quickly if you were the sort of person who was. Bluesky’s far superior self-moderation is absolutely very useful here.
There has been such a consistent attempt at ramming square pegs into round holes online in trying to “both sides” a bunch of these issues.
One trait is immutable and the other is not.
One trait is entirely internally focused and is not defined by a rejection of anyone external to the subject, the other's trait is entirely defined by such an external focus on the rejection of another person's immutable identity.