Honestly I have never understood why Pakistanis get so angry about this.
If anything Pakistan and Iran can work together to correctly utilize these fighters. Instead of fighting against Iran, maybe Iran and Pakistan could make some kind of backroom deal where Iran could train them in its own conflict zones and then Pakistan can use these experienced fighters to do its own work in Kashmir or wherever. If you can't beat em, join em.
Fighters trained by Iran have real battle experience in actual wars using real military weapons. Iranian trained rebels like Houthis have successfully been able to overthrow governments like Saudi backed gov't in Yemen despite Saudis huge defence budget. Iran taught Houthis how to launch missiles at Saudis and use heavy military equipment. Iran is doing stuff right that Pakistan is not. Kashmir is barely a war, its more like an armed insurgency with some occasional stone pelters and in my opinion that's part of the problem. Iran doesn't get bogged down by regional differences as long as all of them have common enemy of Israel and Saudis. Pakistan is not being aggressive enough because it gets caught in petty disputes and can't see the big picture like Iran. India keeps putting more troops in Kashmir while Pakistan keeps taking its eye off the ball in these stupid Sunni Shia loyalty pissing matches. I swear Pakistanis get offended so easily its not even funny. Maybe if Pakistan decided to work with Iran to take advantage of these Shia fighters battle hardened experience in Middle East against Israel and Saudi to wipe the floor with Indian army in Kashmir, then Pakistan can actually have some real success in Kashmir rather than a prolonged and weak insurgency. Indian Muslims are too weak and timid to mount a successful insurgency, Shia fighters who have fought countries like Israel in Syria and overthrown governments in Iraq and Yemen would not be afraid of India, infiltrating Kashmir would be a piece of cake for them. Pakistan should've taken advantage of these Shia fighters a long time ago. Best of both worlds, they understand dynamics of Pakistan and have real battle experience with heavy weapons and they're already trained for free. Perfect for Kashmir. Only on PDF can people be so stupid to be offended by a free asset. Saudis and Americans paid millions to train Mujahideen in Afghanistan, Iran is doing the same for us for free and all we have to do is ask to return them after they get some battle experience. Pakistan has experience working with Taliban, how is working with Shia fighters any different? Win for both sides.
They are Iran's soldiers, they have no loyalty to us. In Pakistan also they would be carrying out Iran's orders, whose interests converge with Indians and its Afghan proxies against us.
How you think Iran would feel if we use Baloch from Sistan-Baluchistan in Kashmir against India or in Afghanistan against their proxies?
Furthermore, Liwa Zanabiyoun and Liwa Fatimayoun have committed warcrimes in Syria and are used as cannon fodder for Iranians. There is not much bravery in committing warcrimes under Russian cover.
If Turks are shredding them, I welcome it. Less problems for us to worry about.
As for learning military policies, sure, we can learn from even Israel. That does mean we import troops whose loyalty are to someone else, especially an enemy of Pakistan.
Ignoring the whole mercenary problem again; we should be resolving our disputes with Iran diplomatically. Nawaz Sharif dealt a huge blow to Foreign Affairs by not appointing anybody to the position which jeopardized relations with almost everybody. If PTI insists on keeping SMQ in the FM, add to his team so that he can work his way around issues. We should be solving issues with Iran so that we can focus on Afg/India and by large the Kashmir issue.
Pakistan's whole policy has been about securing peace with Iran. We bent over backwards to make it happen.
We were content to keep our rivalry only isolated to Afghanistan. Pukhtoons of Afghanistan are an extension of our own Pukhtoons, we won't let anyone harm them. We struggled hard to rid Afghanistan of Indians, Iranians, and NATO, all of whom did terrorism against us, joined together against us, and functioned to weaken Pakistan. For decades we were kept out of Afghanistan due to our own struggle against TTP, now we were victorious. It is time to put the last nail on the coffin of our enemies in Afghanistan to secure a peaceful and safe future for Pakistan.
This is all for Pakistan's own internal interests. The issue is not Sunni-Shia, it is between Iran and all its Muslim neighbors. Afghanistan, Pakistan, Turkey, Gulf Arabs, civilians of Syria and Iraq, etc.
Realization is dawning on us now. We always knew that US and Iran were on the same page, but now we will see how far they have united together against us. Next few years will be very educational for Pakistanis and others.