I would assume it's just the typical tranny communists who've hated KF for years. The site got a lot of attention as Chris-Chan trended on Twitter and everyone was googling who he is, and literally every wiki article etc. references Kiwi Farms as the website created to follow his antics. The people who hate KF hate that it's relevant.
CIA dad trying to silence the internet seems like a far-fetched power fantasy to reframe your shitposting as fighting for freedom of speech or whatever, but seeing as how /pol/ assumes they're being attacked by the Mossad every time the site encounters a hiccup it's not exactly a new phenomenon.