Pakistan was formed for Muslims as an Islamic state. Those who left everything behind in India to live in a Muslim state did not become Pakistanis after 1947. They were already Pakistani's at heart before 1947, they waited for the boundaries of Pakistan to be formalized so that they can live in Pakistan, as Pakistanis. ANP is furious because the citizenship of Afghan Pathans is questioned, while the citizenships of Muhajirs is not. The difference between the Afghan Pathan's and Muhajirs is that Muhajirs left a comfortable home to live in Pakistan, when Pakistan as a country was forming. Afghan Pathan's on the other hand did not migrate to Pakistan, but instead continued on living in Afghanistan. They only migrated when the Russian army started killing every Afghan in site...that is when they remembered Pakistan, and it was during the mid 70's that 1/5th of the Afghan population migrated into Pakistan. Afghan Pathan's are not citizens of Pakistan, as they migrated into Pakistan as refugees during the 70's. Muhajirs are citizens of Pakistan, because they pledged their allegiance to a Muslim Pakistan, and responded to the calls of Mohammad Ali Jinnah, who stated that any Muslim from the subcontinent who immigrates to Pakistan will be a Pakistani citizen.
Hence any settlements that Afghan pathans make in Karachi or in any other place of Pakistan, should be classified as an illegal settlements. They could have been Pakistani's if they made sacrifices in 1947, but they chose not to. They came to Pakistan, out of necessity, and not due to their love for Pakistan. Most Afghans, do not even recognize the Durand line. They believe that Quetta and Peshawar is a part of Afghanistan.
Regardless of what maybe, MQM controls Karachi and Hyderabad. ANP is a hopeless lost child in those cities. They have no power to affect any decision in Karachi or in Hyderabad. 99% of them are not terrorists, but 100% Afghan Pathans are illegal settlers in Pakistan. Pakistani pathans are Pakistanis, but not Afghani Pathans.
If the notion of Punjabis, pathans, sindhis, and muhajirs is not elimenated from Pakistani society, then Pakistan will soon degenerate into 4 different countries. Punjab will become Punjabistan, the western border of Pakistan will become Pathanistan, Karachi and Hydrabad will become Muhajiristan, and the rest of Sindh will become Sindhistan...Azad Kashmir will in all liklihood become part of India then.