First strike make sense if we can detect that Pakistan is preparing for a nuke attack. Now consider a hypothetical scenario where Pak has decided to go for a first strike against us and we have detected it. Give me one good reason for us to wait till those missile reach India...Do you honestly think that no first use policy will stop us from launching our nukes before we are nuked???? Answer is plain no....So now give me a good reason to change the policy.....
That is not exactly the case is it ? because if ( in the aforementioned scenario ) we launch our nukes after we 've detected launches against targets on Indian soil then
our targets would be strategic & military installations , maybe civilian centres in retaliation etc etc . However the damage on our side would be massive - military targets - bases , storage facilities , Trombay , silos - even cities all subject to how potent our ABM system really is.
With MIRV ed missiles I suppose other than save a very few selected , high value assets there isn't much we can do to prevent devastation.
Now considering an alternate scenario......
Suppose backed up by a strong military intelligence , our own recon sat network etc we manage to identify most of their launch sites , storage locations etc
and the moment we see the crisis taking a turn for the worse ( forcing Pakistan to recourse to nukes ) we
Pre-empt their strike by one of our own against strictly military targets to neutralize most of their nuke assets .
This would dramatically reduce civilian casualties on both sides of the border wouldnt it ?
The whole premise of this subcontinental MAD doctrine is that in the event of a conflict when Pakistan's existence is threatened by our conventional forces , they will resort to the nuke option and they deliberately keep the nuke threshold low so as to keep our planners unsure when exactly the point of no-return is . We could easily neutralize this unnecessary hinderance by changing our own .
Some folks seem to be thinking that in the event of a war we get to change the rules which is true but since we have democratic traditions with the army firmly under civilian control it would be far better to remove any doubt in our military high command right from the onset . Once a conflict has begun even if it be conventional , The PM should not be left to interfere with the army's strategic thinking all because of one of his fingers on the red button. It should be clarified and sorted out much much in advance.