Nike might be in denial, but they don't get to cherry-pick which posts stay or go since they don't run this site. Bummer, as they probably wish all those leaks and viral threads, like the one about Rat's departure, have never happened.
Read the site rules and it should be self-explanatory why the site mods delete some posts - mostly for the use of names or private info, doxxing, foul language, personal insults (towards individuals or groups), trolling, cyber-bullying, racism, talk about religion or politics.
As for the thread in question, I've happened to read it before it got pulled. It wasn't a constructive discussion about anything, it was basically just a whining ("oh my god, do we really have racists among us?") about obvious trolling (a couple of racist posts apparently made previously) topped up with more trolling/racist posts.