Being Iranian doesn't mean you have any knwledge of how those black people got there. Study your Persian history in depth and you will come to the realization that the people of the island of Qeshm and Bandar Abbas are hybridyzed Arabs of Yemen who clolinized the region in the time of the invasion of Ala from bahrein (early Islamic invasion of Pars province in the 630's).
Furthermore, if you were Iranian, you would express yourself in Persian (in other words, Be Doorood) and not in Arabic, the language of the invader (and your ancestors perhaps?)

The Black African presence in Iran goes back 1300 years ONLY!