The notion of a sovereign nation maybe can be rethought. If Pakistan can’t control activity within its borders, maybe modestly declaring smaller borders that it can control is the solution. The rest is open for foreign invervention.

That the nation can control what it is sovereign over is the reason for negotiating with the nation, and not acting unilaterally, in the first place.

If the nation can’t control it, then ways to work around it will be found.