No dear, it will end it VERY VERY quickly, the US cannot take any more financial pressures! its trllion dollar industrial empire is rapidly going southwards and they just cannot fight another protracted war! And whose going to supply them with a logistic route for this war? GAME OVER!
Lets hope something like this does happen, it will surely end Indian and US wet dreams. true, Pakistan is going to suffer alot, but will be the last man standing! I kid u not!
Secondly, do u have any idea how many Pakistanis have guns in their homes? before u know it, the Pakistani borders will be swarming with volenteers to fight these Indians and yanks! Im positive that at least double the total strength of the Pakistan Army volenteers will be willing to fight! Pakistanis are a very martial race, like our Afghan bretherens and we have ALOT of ammo and guns!
Thirdly, such an act can very easily become a conflict which will not remain isolated to the US, India and Pakistan. Don't be surprised if China, Iran and Israel also get activated, and in such a case God knows what will happen!
btw, the americans know very well about these problems otherwise they would have attacked Pakistan 5 years ago. Thats the reason they are resorting to a 4th generation war on us.