My honest 2 cents on the whole situation.
Taking into consideration
1. Pakistan's internal turmoil, economic instability, and political unrest (read Imran Khan) have created a state of mass resentment among the Pakistani population, especially the younger generations, towards the Pakistani military. Asim Munir understands that the control over the masses is slipping and is at a tipping point in places like Balochistan.
2. Asim Munir's speech last week, the mention of the two-nation theory, the call to arms to the youth against "Hindu" India, when related to the specifics of the attack, makes it obvious that the speech and the attack were coordinated and not cause and effect.
3. The attack itself, the lack of indiscriminate or emotional firing, methodical target acquisition, confirmation, and execution, and the surgical infiltration and exfiltration of the terrorists, reeks of ex-SSG involvement. This was more of an attack planned and executed on the Pakistani deep state's initiative rather than the TRF's initiative.
4. The immediate scrambling of air assets by PAF and the deployment of airborne early warning assets after the attack, even before there was any official condemnation of Pakistan's involvement in the attack from the Indian government, hints that the Pakistani military is preparing for something impending. This wasn't quite the case right after Uri or Pathankot.
It seems like Asim Munir is trying to repeat history i.e. fight a war with India, he knows he'll lose, to divert the average Pakistani's attention from the crises in Pakistan and also hope for large sums of foreign aid to fund his war efforts and pump some money back into his almost bankrupt economy. Bonus, destabilize Kashmir again and re-launch the local terror outfits in Kashmir.
Now, having said this, it seems to be a bit of a trap for India. I don't think it matters so much to Asim Munir if India acts upon blocking the water of the Indus. It's mostly about the optics. And India, I'd say, has chosen to call Pakistan's hand with the very official press briefing. So as of now, everything is going as per what I perceive to be Asim Munir's game plan. I'm pretty sure the Indian government, however ignorant about defence innovation and modernization it may be, is conscious enough to be preparing for a full-scale military engagement with Pakistan, but we need to be careful. This seems to be a well-planned campaign if it is what I fear it is.
Again, this is a personal analysis of the situation. Anyone is free to agree or disagree.