Wait a sec - the Iranians are allowed to enforce a border?
If both Iran and India move against Pakistan the Pakistanis will be forced to either lose or us nuclear weapons. Either way they lose big. As Pakistan in is a s*ithole I say let the Iranians and Indians have it. They can divide it up however they please. That’ll just mean one less worthless country to worry about. If the PRC backs the Pakistanis and invades India then side with India in the sense of giving them recon and material support but don’t commit any troops. Having talked some Peoples Liberation Amy guys when I was in Hong Kong I am not impressed with Chinese military might.