very simple we don't hit random kurds , you first must prove your claim about their involvement in Pakistan otherwise they are as protected as a guy living in Tehran.No offense but if you can hit Kurds in Iraq then why can't we hit Balochis in Iran? Is this psychic law one sided?
iran is serriously against changing any border by military force so I doubt that .its law of reality. your govt will leave Iranian balochistan alone because it cant actively manage 2 states militaries on its borders. If you open up an Iranian front, Iran might end up using India to divide your country, then annex the SHia-leaning parts to it, and the rest can be like West Ukraine- those Pakistanis and US can enjoy that leftover state together.