I think both countries understand the risk of nuclear war. That is why they keep on spending on conventional weapons. The secenario from Pakistani perspective would be that a nuclear strike would be preceeded by a non state incident whereby, Inida would respond through quick but limited strike through its IBG's.
Not exactly. What you term as military "buildup" for us is actually modernization that was due since 90s. At that time we had a dumpy economy and Russia was in a shytestorm so we couldn't modernize.
The play beocmes tricky after this. How far the IBG's would penetrate or how many fronts are opened simultaneously before PA is pushed to order a Tactical Nuclear Strike.
You must understand that any nuclear strike whether standard or "tactical" as you call it, would throw open the nuclear threshold for any form of retaliation in same or greater measure. You're not the first one thinking of tactical nukes, since former world powers have also thought and abandoned such plans. A nuke is a nuke whether 2t or 200 mt in power.
Another factor comes into play here. What if the limited Tactical Strike is launched on Indian Armored Brigades on Pakistani soil? What then? Would India counter strike with Nuclear Weapons?
Naturally. If the GOI doesn't retaliate in that fashion (seeing this conflict itself being a form of retaliation), that government will be skinned alive by the military and the people. During combat operations, the armed forces can say NO to the government under extreme situations. This is one reason why the GOI doesn't conduct war; greedy politicians fear that the military would taste blood of power to say NO to any damn rubbish the government dodos throw at them.
IMO, given the current situation, the IBG strike is a cushion, created by India to give it maneuver room to use "Other" options to tackle Pakistan. It knows fully well that except for a rouge launch possibility, Nuclear exchange is next to impossible as other nations will step in quickly to diffuse the situation the moment conventional engagement starts.
Nukes are deterrence for us. We don't intend to use it unless someone has really lost his mind and plans to threaten our national survival. Wars will be conventional and it will be tiny and rapid conflicts unlike the years of fighting like in WW2.
No nation would take any "strong step" today if there is military tension. Maximum a negotiation request would be made by a nation willing to mediate as diplomats. Nothing more.
Besides, we aren't crazy enough to attack you and slow down our economy, unless you're cuckoo enough to cause another Mumbai attack.
They have calculated that it will take atleast a week before external diplomatic forces come into play, earnestly. A week that India thinks it needs to "Teach" Pakistan a lesson.
Only if another major jihadi attack (goodness forbid) happens in India. Otherwise, we don't want to waste time and money over wars.
Development of nuclear tipped shells fired from our 155 mm SPG's and the M 110 SPG's would be a capabiltiy that can give India second thoughts on the IBG strike scenario.
I told you, anything that has to do with nuclear weapons would throw open the threshold for retaliation to any limitation. Even your most fanatic of general won't consider a nuclear option. If you read carefully, COLD START was never a land grabbing strategy. It was a punitive strategy aimed at causing similar damage to any that is planned against India. That's all.