What you see as Pakistani “paranoia” is very calculated Pakistani charade to not cooperate in WOT or extract a higher price from Washington for it. They play their “paranoia” card so that they can get Washington to put pressure on India to concede more. Thus they can milk US and also get away with murder. And the world can paint India as the culprit for Pakistan’s paranoia.
If Pakistan really desires peace its not a very difficult proposition. India with her economic growth has far more to lose in a conflict and more to gain from peace. That doesn’t mean India will sit quietly even after several 9/11 like provocations. India has a way of giving it back to Pakistan without lowering the nuclear threshold.
Actually, paranoia is common to Muslim thinking. The size and expense of Pakistan’s nuclear program suggest that such paranoia is genuinely felt.