The Pakistanis are absolutely rubbish at creating a consistent narrative globally. Look at the Israelis, they constantly push the line of "combatting terror", as do the Indians, to justify their actions, to the point where if you tell a lie often enough, it becomes the truth.
If Pakistani politicians were not donkeys, instead of constantly barking on about "investigation", they should be constantly highlighting the fascist Hindu ideology, the rape and atrocities in Kashmir, the blood on modis hands and how the west love him so much etc. this then build a credible narrative for attacking RSS and BJP infrastructure in India.
Look, the Israelites, Indians and the US do a good job of "separating" and creating division against their enemies. The Israelis with Hamas/Palestinians, the Indians with LET/Pak army etc. this gives "legitimacy" to their actions. Pakistan needs to do the same, destroy some RSS buildings, the images of dead Hindu fascists in brown shorts will create intense divisions, "legitimise" Paks response, and put through ball back into India's court if it wants to escalate. The Indians can get away with attacking non military targets in Pakistan under the guise of "terrorism", but the Pak military has limited options. It can't attack Indian military targets because it raises escalation, it can attack civilian infrastructure like dams because then they would become demonised globally. It can only attack it's actual ideological enemies in India, i.e. the fascist Hindu ruling elites.