That is why I admire Dev's qualities yet never give him credit in relation to Durga. He has not only past to account for but needs to grow a backbone in present too. For any girl it is an insult if her identity is questioned and she is asked to lift her clothes to show a birthmark and prove herself at someone else's house. This is no way to treat an outsider at one's house.
Dev was too mild in his protest. He could not take a stand. And he and his mother rather joined the circle of those who came forward to look at Durga's birthmark. Especially Suchitra was very curious!
It is not just that Durga is Nitya that Dev should have said something but for any girl in general!
Dev has a lot to prove. Long way to go.
Merely registering protest is not enough. You need to take a stand.
Stopped because of Shaurya or Rajnath or Sakshi is no excuse.
He could have atleast said not to do drama in drawing room and take Durga to a room where female members could check her birthmark.
Dev just wants his things to be done his way and as long as he is not personally affected he remains in deliberate ignorance of sins of other Goenkas. He is like those milds like Bhishma, Gandhari on Kauravas side as of now. He knows the wrong but is somewhat silent and inactive.