I beg to differ on this. As you said PA is the bond then any attack on PA will also unite them against us. Also do not forget that for any long term war we have to be ready for a possible "N" attack. This is where we are likely to suffer more than them, since any nuclear fallout would be catastrophic socially, environmentally and economically. We would loose investments and jobs + food shortages.The adhesive that bonds them together is the PA. Remove the army and Pakistan will fall. To remain in power, PA needs a purpose or an enemy. That's where Kashmir and India comes in.
We need to hit them in their own homes and in their own town. It'll break their morale.
The only viable solution is to bleed them through thousand cuts, but through carrot and stick method..