He got a big ego problem that's why he can go to any end to satisfy it.
He is after Veena more then like a REVENGEFUL AURAT only because that poor girl once nominated him in his presence in open nominations several weeks ago which even she may not remember by now and obviously it was a part of the game, but this person kept that in his heart and nominated Veena week after week after week just based on that one reason.
His ego also crushed when Manoj became the captain and there was a big war between them for 2 weeks, while it was not a Manoj's fault at all that the housemates chosen him as captain.
Then he tried to be a hero after dolly-shweeta fight and shown no interest to line in the house and left on his own will, but when Salman told him for a comeback chance his eyes started shining like a greedy man. It shows that after his ego its only 1 crore ruppes that values for him. He has no values when it comes to a house from where he has been kicked out for a wrong reason according to him
Now here r some facts about his supposedly hero-giri and Kurbaani & Sangharsh for hypocrite Shweeta
1. Sameer's ego once again crushed by Dolly who gave him answers straight on his face. He was in a "mokay ki talaash" whenever he can belitte Dolly and satisfy his ego.
2. Even one day before the fight took place, Sameer in his conversation with BB in confession room very clearly stated that now he is waiting for an opportunity to teach Dolly a proper lesson and is waiting for such an opportunity as he did not done anything to Dolly then why she will be scared from a woman.
It was infect his crushed ego that was speaking and was trying to find an opportunity to satisfy itself and luckily he got a golden chance just the next day.
3. Sameer never interfered when Dolly was abusing shweeta for so long and she was abusing Dolly in return. He stood at one place quietly and saw all the tamasha and let gave Dolly all the gaaliez which shweeta returned with interest... Ashmit was very right in saying that if Sameer was genuinely doing that for Shweeta he should have interferre at start or atleast middle or could take Shweeta inside, instead of trying to start his own fight when everything was ended.
4. Sameer waited the fight to be over so that he can satisfy his ego too and wash his hands in behti ganga to take advantage of the situation.
5. Sameer NEVER took stand for Shweeta, as Shweeta NEVER needed it at that time. Shweeta defended herself very well by becoming equally abusive.
The fight was over...Dolly became quite and everything became THANDA. Then this Sameer came like a provoking person, and started crossing Dolly's ways when she was quite and over with the fight and there was NO USE or purpose left to confront Dolly when everything was solved and finished.
He did not even spoke anything in Shweeta's favor but was blocking Dolly's way and giving stupid irrtating expressions and provoking Dolly by asking her to shout in loud voice.
6. If he would be that fair and honest person who once kicked by BB from that house, he would never have come again for his self-respect,...but his eyes started shining and he was tooo too happy when salman only said that he might can go inside as there r chances... it proves that one crore is dear to him more then his values, and he is nothing but an OPPORTUNIST and EGOISTIC person.
As far as DOING FOR SHWEETA is concerned, its allll BS , no one is a kid here who can't understand what has happened. Even the housemates clearly stated that Sameer was trying and planning to confront and bash Dolly some day as he himself confessed to the housemates, housemates like Ashmit, Hrishant and Veena clearly stated that he never done anything for Shweeta during the fight and the drama of blocking Dolly when the fight was over was just for his own self-satisfaction.