There are a variety of reasons. 1 is the breakdown of the muhajir identity. 2 is the failure of Pakistaniyat to deal with the ethnic issue. I was part of an organization where displaying any ethnic sentiment was disallowed. When people asked we were to never give our ethnic identity as it could come in the way of nationalism. But that failed to break the ethnic identity. Our approach was wrong. Pakistaniyat can never break ethnic identity. Ethnic identity can break ethnic identity. You may not understand the meaning of these words...
I have explained my point of view so many times it makes my head spin when I do it again. Maybe I am confused but it was bound to happen when your parents move and apply a false identity to themselves. I made 12 trips or more to Lucknow and for a while I felt like a refugee. lol. Other muhajirs haven't even been there so how are they being linked to a land they have never been there?
Muhajir is not an identity. We share no common culture, it is a discriminatory term meaning pilgrim and basically people want me to call myself that. It should be a good thing someone has taken an initiative in this regard.
It would be interesting to look at this post 17050:
http://www.defence.pk/forums/members-club/209904-naswar-corner-1137.html
Furthermore this thread is on my views on muhajir-I do consider myself a son of a migrant from after the partition-indeed but not a muhajir. The only real choice for muhajirs is to reinforce original identity or adopt one. Quaid e azam wanted migrants to merge. He would have been enraged if he saw how migrants made an empire for themselves and destroyed the benefit of Urdu being a neutral language-and things favor our family and other families like ours inherently. I heard only abuse for other races. Call it guilty concious or a message to my family but Za Pashtun yam aw zama watan Pakistan de.
I can give you the speeches of Quaid e Azam too. To view my views on the muhajir identity itself-check this thread:
http://www.defence.pk/forums/national-political-issues/228096-split-discussion-muhajir-identity.html