The only time the words muhajir, sindhi, pathan, punjabi etc. cross my mind are when our politicians bring them up...We need to deal with them and stand up as a nation to tell them to stop their shenanigans in Karachi..As for Karachi becoming a new Bangladesh, I dont see that happening...First of all, people of Karachi know their issue are the three big political parties and their armed gangs who will still be there...Karachi people dont even riot publicly when their families and friends get killed, I doubt they are going to do much to become a seperate state...I have seen many talk shows where Karachi people were interviewed, I dont see them calling for a different state, they mostly say we are pakistani muslims only and these parties need to be dealt with..and Karachi is a good mix of different ethnic groups, before there can be a separatist movement, the armed gangs of ethnic groups will fight each other over who would have more influence and the separatist movement will be forgotten in the bloodshed..