I think it's already widely known that the developers of the Lemmy software hold questionable/extreme ideas, which they don't hide. ~~I think it is not good to give them money or extra publicity, since that could drive away new users when they find out. Also money better not go into extremist hands.~~

~~I think there should instead be a donation link to help the instance maintainers and moderators.~~

Ideally however, it would be best if instance owners joined hands and forked Lemmy under a totally new branding and used that on their servers instead, in order to completely disassociate from Lemmy the software and its developers.

EDIT: You all have good points. On second thought, maybe you're right: it would not be decent to not donate them for their work. However I'm still not happy that genocide-deniers get this publicity :(

EDIT2: Just so that you don't think I'm making this up, please see this well-researched list of sources from the user spirit.