There it is. the racism is finally coming out. so sticking to one's culture and language is racism? if that is the case then all sindhis, balochis and pashtoons are racists, and are not Pakistanis. did the pashtoons learn to follow punjabi customs, seeing as they are in the majority, if not then it is racism (according to your logic).
Pashtoons of Karachi are so nationalistic because their minds are full of hatred like yours. they were not attacked, they were the ones doing the attacking. even today, a person belonging to other ethnicity can not run a business(can not even set up a stall) in pashtoon dominated areas in Karachi(not just urdu speaking), that speaks a lot about their nationalism. They were the ones committing murders in 1965 in ayub khan's victory parade, and they were the ones committing murders in Qasba colony, and they were the ones committing murders and destroying businesses in Shah Faisal colony long before MQM existed or had any power. please do not lie on a public forum. at least have the decency to accept terrorism for what it is.
Pashtoons supported Pashtoonistan, and break up of Pakistan long before MQM even existed, but ANP is alive and well today, and definitely not nationalists, and now rearing its head as PTM, again a band of thugs.
Sindhis started demanding Sindhudesh (and understandably so) after the break up of one unit, when certain rights were not granted, long before MQM existed. JSQM and JSMM are still active. PPP thug party still rules Sindh.
Balochis were rebelling and seeking breakup of Pakistan, again, long before MQM existed.
But.... only Urdu speaking Karachiites are racists and nationalists and supporters of thugs.
Pashtoons in Karachi, Punjab and Balochistan havent blended in either. who is the racist there?