A) At a minimum, If India starts heavy shelling from thus side and Afghans take advantage from the other side, does p-a-k-i-s have wherewithal to stand pounding from both sides?
They can't handle us by themselves. And the Afghans can keep their guerilla grind up from the west. The real advantage is only in case of an invasion though, whether limited or all-out.
B) Can India do sustained shelling for long periods of time?
Yes, but we can run out of targets before that. Our post-Ukraine production is off the charts today.
C) I think Modi will hit a terror center or pak army station this time.
My guess is a large terror base first, followed by any escalation that makes Pakistan the aggressor.
We were supposed to follow-up Swift Retreat with missile strikes, naval action, and even a limited war, but Abhinandan's capture led to de-escalation after US intervention.