I understand the whole Cold-War calculus with Pakistan including the Soviet Union, but after 9/11, we should have just given up completely on Pakistan and told India - “Do what you want.”
Pakistan should now be viewed as an enemy. The goal should be to break it up into its ethnic and tribal pieces.
Not possible while:
That would be good -- Pakistan is divided into 4 areas and with 7 different regional groups.
The Punjabis are dominant and have their own province of Punjab. The Sindhis dominate Sindh, the Baluchis Baluchistan and the Pasthuns/pathans dominate the North-west frontier province.
The Pathans are really the same people as in Afghanistan, artificially separated by the British-era Durrand line.
the Baluchis are an Irani people and separated from their Balochi brethern in Iran's Sistan-e-Balochistan province
Besides these there are the Brahuis, a people in Baluchistan whose language is related to Tamil from southern India. But these associate themselves with Balochis mainly
The big non-local group are the Muhajirs who are folks from the Ganges river who came to pakistan after partition and live in Sindh mainly. they have no "land" of their own
The 7th "group" is actually a variety of different groups of people around the NWFP who don't seem Indic or Iranic but the third subbranch of the indo-irani branch of Aryan languages -- the Dardic languages.