Kash and Rakhi bonded very beautifully when the show started. Most other inmates were apprehensive about Rakhi. Rightfully so, because of the image she had in the outside world. Rakhi was the outsider, a social outcast because of what she does for a living and how she behaves in the real world. Everyone has read numerous articles about the kind of shows she does and the ugly responses she has invoked or the obnoxious behavior she displayed. Whether we want to accept it or not the truth remains that Rakhi's public image is less than perfect. Of course Big Boss changed everyone's mindset about her. No one else in the house connected with Rakhi except Kash. Kash trusted Rakhi very much. She kind of took her under her wing. Kash became her friend and was shocked to know that Rakhi nominated her. From Kash's POV... that was a super duper dhokha!! This girl, who she believed she was obliging by being her friend when others clearly didn't like her, sprouted her own wings and attacked her. That must've hurt. So Kash is all against her and her only and don't kill me but I kind of get it.
Also I think some ppl become fans and then decide that those ppl are perfect. They are not. Accept them with their faults. I want Ravi or Rahul to win. Yes Ravi has had his share of extramarital flings but who am I to judge him? I enjoy what I see on my screen and I know that he is less than perfect. So is Rahul. He is playing the game but I appreciate that he's playing with dignity not losing it like that crazy Amit. I don't dislike Rakhi and I sometimes feel sorry for her but the fact remains that she, like any other inmate, has made mistakes and has been quite vocal about things not concerning her. So she has been ostracised. Don't worry, they'll come around.