First of all I want to thank you for making this lovely post. Enjoyed reading all the responses ad here is my 2 cents worth on the topic...
It's very difficult to say point blank who is right and who is wrong.
Adarsh's attitude did irk me in the beginning but when you consider his persona and his extreme attachment to his family, particularly his "chotu" we can accept his behaviour.
Also there has been so much proof against the Jilanis that no-one can blame him for bring convinced that they are guilty. (Although the proof has been manipulated and even planted).
But I have one thing against Adarsh...agreed he goes by the proof provided but if he really loves his wife as much ad he had claimed to, he would at least try an reason with her, be a bit more supportive of her feelings and at least help her in her efforts to find the truth.
Swadhinta on the other hand has always maintained that she is trying to reveal the truth. She has never asked her in-laws to believe in her belief... on the contrary she has told Adarsh and suhasini that all she wants is for the truth to come out and for the real killer to be brought to justice...even if it is turns out to be Assad...
In my opinion that's what Adarsh also should have done...he should have at least supported her in her belief and given her some moral support in her efforts to find out the truth...even if he does not help her physically in her search for the truth...