Why do you think anyone would nuke Port Blair?
Let Shaheen-III arrive, then we can threaten Port Blair.
IF India attempts something like, Pakistan's ASFC would never have enough time to detect the incoming missiles, forward it to the higher ups, take a decision and order a counter-launch. The time windows is too small to react (around 5 minutes). So, we simply cannot respond spontaneously, with the present command and control system.
No
Shaheen-II has a range of 2000km. The upgrade to it, Shaheen-III, will cover all of India once deployed.
No Capt. , you are not entirely correct. You've been quite insistent on the "hara-kiri" stuff, but it simply does not happens like that. Pakistani and Indian nuclear weapons and their delivery systems are not at par with the Russian and American ones in terms of readiness state, and YET analysts concluded that limited nuclear exchange was fairly possible between them during the cold war. You can't just press the "red" button, there is a whole lot of human factor involved.
When you know that you can press it any time you want, and that the enemy cannot stop you from pressing it....then you decide to sit back, relax and think all over it i.e. either to stop the MADness or to continue it. It all depends on the communication channels.
However, if somebody is mad enough to do something like that, he would invite unacceptable damage upon India itself. So the small, teeny TNW saves the day and deters the conventional assault in the first place.