This post links to Soapbox, which is run by Alex Gleason, the Neo-Nazi who runs Poast, Baest, Spinster, and even helped run Truth Social. We're already in fashy shadow-fediverse territory here.
Nostr is literally a social network made by and for Bitcoiners. Its defining feature is being "censorship proof". Scams, Nazis, and CSAM are pretty much everywhere.
Nostr is basically decentralized 4chan with worse users.