Its impractical actually to say the least . Because , it is India's turn first to face the dilemma starting the whole thing , in the first place . Because if Pakistani nuclear thresholds are stepped over by Indians crossing the border and implementing the Cold Start and if in any way , the country's existence and integrity is in danger , then the country's strategic forces command will not hesitate - not for a second to lob a nuke or two at the invading troops/IBG's , whilst the rest of SPD gets ready for a massive strategic strike at a " moment's notice " by then , wait for enemies response to turn back or continue and then decide accordingly what to do . Retreat , save a billion or continue , lose a billion , the equation becomes at that time for New Delhi . If your doctrine asks you to endanger the lives of billions of Indians and that of India's existence as a state because a ten to twenty thousand invading troops have been nuked in another country even though your existence and integrity isn't threatened and no red lines have been crossed , nothing can be described as more suicidal . Looks good on paper , but doesn't appear practical/realistic . For the time being , though , the Cold start has gone cold because you remain constrained by your own doctrine . Ironically , the Indian nuclear doctrine of " Massive Retaliation " is contributing to the success of the Pakistani deterrent .