I second that, i have a strong feeling that after America withdraws or at least lessens its presences in Afghanistan, india will not have a hard time gathering allies to fight Pakistan, but as the saying goes "you reap what you sow".
Thats because historically before the british annexed NWFP, FATA, and Balochistan these areas were a part of the Afghan empire and the people of these regions are tied to Afghanistan both culturally and ethnically which is why they are different from the rest of Pakistan, heck they still call themselves Afghan.
Yeah, i heard about this incident how Abdul Salam Zaef took refuge in Pakistan and seeked the help of his Pakistani "allies" but instead the Pakistanis handed him right over to the Americans who humiliatingly beat him right in front of the Pakistanis, but i can't blame him for that, the Pakistan army and government will even sell their mothers to make their western masters happy!
The Taliban didn't recognize the durand line even before this war, and besides the last thing the Pak army and ISI want is the durand line to be recognized by Afghanistan otherwise how else will they send young Pashtun children with bombs strapped to their chest into Afghanistan to kill Afghans??