(The original joke, if you don't know it, is no. 2 on this list: https://forward.com/schmooze/421730/the-10-best-most-classic-jewish-jokes/)
Seriously, though, the #meta is over the instance simcha.gay/simcha.lgbt defederating from babka.social, another Jewish instance. the announcement: https://simcha.gay/notes/9h9ji15xigz8yctv
a user posted a link to a satirical article (tw: transphobia https://preoccupiedterritory.substack.com/p/use-my-pronouns-also-i-override-the) that likens western leftists calling all Arabs in Israel & the Palestinian territories "Palestinian" as akin to trans people demanding gender-neutral pronouns and claiming there is a trans genocide, implying both are attention-seeking ploys for political convenience.
(this echoes various pro-Israel arguments that "Palestinians" are not really a thing that existed before the establishment of the state of Israel, and that Arabs are well-treated in Israel and self-styled Palestinians are just angry Jew-hating holdouts who simply need to reject their leadership and become Israeli to access rights and equitable treatment.)
so basically a double whammy, virulent transphobia and an attempt to erase Palestinians/paper over existing inequalities and increasing anti-Arab violence in Israeli society.
the babka team deleted the post without disciplining the user, which simcha did not consider sufficient, so they defederated.
then babka announced they would also defederate because of harassment and bullying from simcha admins (https://babka.social/@babka/110726254078880716 / https://archive.is/ieFqJ). needless to say, simcha denies this. the babka team has not gone into specifics or produced receipts/logs.