Saurab may have made some people happy with hs rudeness to Bijoy. But Saurab himself has taken refuge behind Bijoy's loudness like when confronting Radha and Vicky when they sowed seeds of doubts in Mrs Mondal's mind. He should have accompanied Sona when she went to return the 4.5 crore cheque.
I think more than his worry for Sona, Saurab is ranting against any past injustice he has felt against Bijoy. Very sad to see how everyone in the family is against Bijoy. I hope he retreats now and let both his kids do as they please.
He really does not deserve any of his child's anger/hatred.
Asha lets everyone, Dev or Saurab insult her husband. I don't think Bijoy will keep quiet when any of his kids are speaking so badly to Asha no matter what the reason.