And now you are off on a tangent. Where did I say that India is a bigger threat? It is a threat, however, and therefore requires resources to be placed on the Eastern Front, hence my argument that the US should in fact apply pressure on restraining India that allows Pakistan to move resources to the West. In fact,some reports suggest that military resources have already been moved to the West, how much more is contingent on the threat level from India - that is where the US comes in.
My point remains, which you have chosen to skip entirely in your post, that this war cannot be prosecuted successfully by Pakistan unless there is a viable Pakistani State backing it. Pakistan is already struggling with the war at the level it is in FATA. To expand it significantly by acting against all Taliban factions raises the specter of the war becoming unmanageable, and Pakistan being destabilized to the point of collapsing, unless the US is able to relieve pressure on Pakistan through the policies I pointed out. You have offered not arguments as to how this pitfall is to be avoided.