I generally refuse to respond to people whose mindset is already clear to me and I can guess where their hatred for Iran comes from, but do you seriously think that it's hard to obtain an Iranian passport for a person who has millions of dollars in a place like Sistan and Baluchistan of Iran?
All you need to do is bribe some of the officials to issue you one. Sistan and Baluchistan of Iran is a corrupt place like many places in Pakistan. In fact, one may say that culturally they are closer to you guys than they are to us. They still have a tribal mentality and there are powerful families that are respected by everyone in that part of the country because they're afraid of them and they hold a lot of power in those areas. One such family is the Rigi family, for example.
And then there are of course state level actors who can very easily counterfeit documents of other countries, no matter how many security measures you have included in your documents. It is in fact a possibility that Uzair Baluch had Iranian documents with the help of corrupt officials in Pakistan itself. I have heard that some Afghan immigrants and criminals who want to travel to Iran have bought counterfeited Iranian documents which look real and are apparently issued by Pakistan. So, go figure.
If all you have about our support for some criminal in Pakistan is a passport, which can be easily counterfeited, you really need to try harder next time.
On a side node, Kulbushan was handed over to Pakistan by Mullah Omar Irani, a Salafist jihadist affiliated with Jaish ul-Adl with links to Al-Qaeda and Jundullah (whose leader Abdolmalek Rigi was executed). So, if anything, this whole Kulbushan thing proves Pakistan's link to separatist terrorist groups in Iran and that hardly puts you in the position of higher moral ground.