General Discussion

Pakistan and Saudi Arabia have a mutual defense pact, and given how intent Iran is to attack every country around it - Even the ones that are tangentially allied with them - it wouldn't be much of a surprise if one of the IRGC commanders decides to start targeting desalinization plants.

So far Saudi Arabia hasn't felt threatened enough to call on Pakistan for aid. But, since these desalinization plants account for 70% of the water that SA uses? Iran being stupid enough to bomb them would be severe enough for SA to request Pakistans support.

And since Pakistan is both a nuclear power, and rejects No-First Use policy, well... An existential threat to their ally would obligate nuclear retaliation should SA request their aid.

Once that nuclear line is crossed though Trump would promptly send off some of our own just to brag about how bigly our nukes are compared to the Pakistanis.