In fact I believe this is the cry of their inner Zoroastrian soul that refuses to die at the hands of Islamic repression.
Well said. Iran's soul is indeed Zoroaster.
Case in point, the first Pahlavi King, Reza Shah who hated Islam and loved pre-islamic Persian glory, pondered in the 1930's briefly to make Zoroastrianism the state religion of Iran. However it was determined that a general secularization would be better than upsetting the religious structure altogether.
Regardless of that he invited the large Zoroastrian community in India to return to Iran.
It's too bad the Zoroastrians don't accept converts... there are millions of Iranians who want to get back to their own religion.
However there is also the large secret Bahai community in Iran, which are viewed as heretics by the authorities. Bahaism as a Persian religion that is syncretic, pacifist and with it's good ties to Israel, would be a good thing for Iran.