These are not new, to be frankly. There was no love form the day one but needs alone and have a pawn on disposal of the one. Killing NS, or any other political personality is not going to destabilize Pakistan as such because people have difference of political choice and support to different celeb hence, effect wouldn't be much damaging like we saw at Bibi's time. However, it will be planned as they did in past from time to time like what, economical destabilization can only be done through huge sanctions and what if they have been trying to provoke Military so may take over and world hits us with sanctions due to dictatorship. On the same time, tension created by India on border and all war monger, US/EU would be beating the drum of fearing the war and Nuke thing, would be propagating at large against possibilities of Nuke Attack and a fake Pakistani extremism leadership portray so everyone will jump in.
US might push India to do so and which is more possible by considering the daily threats, routine war mongering and provoking as well as US-India signing more & more pacts LEMOA etc and IMO, people like NaMO can fell for the same easily so we may expect a huge false flag very soon with plethora of blames. The main reason for all the destabilization drama from long time is only subject to our Nuclear Weapons/power and the day we lost, they wouldn't even look at us for any other thing and we are not going to compromise the same at all. US is not going to come here full offensive like what the lot (US, NATO, West) did in Iraq, Afghanistan, Libya etc however, as I said, can utilize the best assets in shape of political gangs from Karachi to everywhere in Pakistan. There was a leak Wire sent by US Embassy Official from Pakistan to DC in which it was concluded as ANP, MQM-A, MQM-H, Liyari Gang War (PPPP), Jiye Sindh and many other ethnic groups will always be available for US disposal and can utilized as when needed. Speaks volume that how things works.
There are plans of enemy and there are plans of almighty ALLAH but in the end, happens only what ALLAH plans.