Your parent is exaggerating. The admins from .ml are not persecuting anyone, not exposing anyone and not even kicking out the existing subscribers that are ok with following the rules of the instance. The "drama" is just that they were clear they are not interested in hosting NSFW content and are not interested in providing a space for the hentai/loli/furry crowd. They defederated from ani.social because ani.social communities were posting loli, and that was it.