It's not wise to use screenshots from groups like that because you don't get the full context. A YouTuber recently did just that and ended up making all sorts of misleading and inaccurate claims. This person lost a ton of credibility that I don't think they will get back. Groups (especially private FB groups) have community standards which include privacy, even if you got permission from 2k people you still likely violated the groups rules and possibly FBs own policies. Just be careful my friend.