Watani, if you look at the history of allegation whenever something happens in india, within 5 minutes of the incident India starts blaming Pakistan, this is their way of doing, they blamed us for many things, in the end the culprits are in their own country even sometimes the hindus are themselves involed, eg Malegon & Samjhota Express blasts. Plus the gujrat riots, babri mosques demolition & killing of muslims, kashmiri peoples killing etc are other examples of indians hatred against Muslims. (these are facts, kindly no indian to post a ridiculous reply)
As for Pakistan, we don't blame india straight away for what happens in pakistan. After thorough investigation & with proofs we had in the past and also now accuse india if they are involved in something. Swat & Balochistan & this baitullah mehsud issues when started, we blamed nobody at the time, but with the passage of time when the dots were started to connect, then the indian involvement directly or indirectly started to come forward, and now we accuse india, hav ing proof in hand.
As for our intelligence agencies, they are among the best ones. ISI was the same agency who in 87 stole the complete battle plan of the indian misadventure towards pakistan, Brasstacks was the exercise name, which secretly was a plan to invade Pakistan, but we had their battle plan, and when the indian forces reached the border, PA was ready and deployed at the exact spots from where indian armour was to launch the pincer movements.
So we aren't as dumbs as indians to accuse before even thinking for a second.