they're neo nazi pedophiles iirc and in the brief time i was on a fedi instance federated with them i saw one of them trying to goad a trans person i knew with suicidal tendencies to kill herself because he thought it would be funny. like its so many orders of magnitude worst its just completely stupid to compare them at all. Like here's some of the defed reasons from the top of the incredibly long list of instances that have defedded it:

Nazi content
Racism
antisemitism, racism, homophobia
Nationalsozialistisches Gedankengut
Hate speech
racist slurs, anti-semitic stuff, etc
Nazisme, Transphobie, Racisme, Antisemitisme
Admins are having Nazi symbolics in their profile
racism, pedophilia, harassment
Serveur d'extrême droite / Néonazi
Repeated harassment targetting specific users
Transphobia, Hate Speech, Nazi Symbology. Lack of Moderation.
Homophobia, transphobia
Hosting neonazis
transphobia / homophobia / racism / queerphobia / nazi combo instance