I’m not sure what made them comment that but I agree with the mod decision to remove the comment.
OP is overreacting for sure and given that they’re a mod on 4 communities I questions what kind of stuff they’ll be doing over there.
EDIT: I think the best part is that the comment sounds like it’s on a post they made but looking through they’re profile they didn’t post here often at all or they purged their posts in this community. So I’m confused.