I admit, I was partially wrong. The CoC violations occured outside freedesktop and he received an email from a freedesktop member stating that their CoC does extend outside their immediate project, to some extent.
This isn’t that unreasonable in my opinion, considering that his behavior “reflects on communities like [FreeDesktop] when [they] interact with and accept contributions from hyprland.”
Of course this should only apply to severe CoC violations considering that two different CoCs rarely overlap in full.
So the reason for the ban was that hyprland’s developer published their email exchange and wrote an extensive, surprisingly hostile blog post about it.
I genuinely recommend reading their exchange, I’ve rarely seen this amount of hostility and toxicity in an email exchange - followed up with “I hope we can resolve this constructively” and “I will be seeking legal action if you continue threatening to ban me”.
Countries share information though. And it is not below a fascist US to give China some nice trade deals for detailed information on queer US-Americans. Nor is it for China to accept such a deal.