And India or Modi has nothing to do in this Iran scenario
It doesn't, but India would be foolish to not exploit the US-Iran stand-off. The US will want to keep Iraq and Kuwait out the conflict. It's very difficult to pull a Normandy in the southern Iranian coast. This would mean using Balochistan as a logistics route and staging area.
India should actively prevent that from happening. The last time India allowed Pakistan to hop onto an American gravy-train post-9/11, it unleashed a decade of bloodshed from paki terror in India. India must actively prevent another such fuckup.
The last time, the US probably persuaded India to sit aside by offering some FDI carrots. The situation now is different; carrots won't do, and sticks don't hurt Modi (eg: anti-CAA streetshittery). So India is in a position to veto any paki involvement in a US-Iran hot-conflict.
Modi demonstrated intent to the US with Article 370 scrapping as a response to their Afghanistan pullout that marooned Indian interests (with that move, a warning shot was fired at Pakistan and the US).
If the pakis court US again for another gravy train, India will respond by heating up Kashmir; this time with kinetic cross-LoC action. We live in an age where anyone can justify any course of action if they have the force to back it up (which India does).
The only way the west can prevent US-Iran from snowballing into WW3 is by keeping pakistan the fuck out of any of this.