That is my biggest worry.
The danger to Pakistan is not from the outside, but from within, the ruling liberal elite of Pakistan, specially within establishment. aka enlightened moderates. These venomous creatures will go to any length to prove their point, even if it is at the expense of Pakistan, its people and its interests. The success of Taliban, is their kryptonite, it goes against anything and everything they preached and boosted about in post 9/11 world.
Pakistan allowing any third country to use its land, air and sea to attack Afghanistan, under whatever pretext, is an unlawful act. Pakistan establishment is directly dragging Pakistan into Afghan conflict when it gives safe passage to American/NATO forces. There has to be a strong opposition from civil society in Pakistan and awareness in this matter. These pseudo intellects, aka enlighten moderates have already caused much damage to Pakistan and they still think they been on the right side all along!