I agree with
@Oscar
The only solution to this for Pakistan, like it was for India in the past, is for Pakistan to become better killers than their killers.
You have to give the morals and the reaching and the drawing room debates a rest for a year or two or five.
You have to go on a spree of killing. Kill so many of them that their own start fearing retribution and desert them like a plague.
Kill so many of those they surround themselves with as comoflage and human shields that they are isolated eventually and have no place of refuge, no place to hide, no place to lay down and rest a bit.
Kill them and kill their own. Kil their wives, their mothers, their sisters, their fathers, their sons, their brothers. Kill their kids, kill their unborn kids. And if it breeds more of them, kill them too, and their own. Keep killing till they either do not exist, or their own back away and out of the fight.
But back out of the fight does not mean the fight has ended. Be ready to kill again. And again. And again. Every time they think of killing or start killing.
Its only when you become a lot better at killing than they are will those not yet killers but thinking of beoming killers then give up the thought of becoming killers.
There is no other way. Let the killing begin, and do not stop till its done.