I think there's a difference between saying a slur knowing it's a slur and saying a slur not knowing it's a slur. It seems to me they just wanted to insult people and because of the environment they're in, they go for gendered insults. We've had a few users who have had to be told they can't call people c*nts even if they're english.
If they apologize for saying those things, that's fine. I think it's impressive how long they lasted.