I must disagree with your conclusion that the Iranian leadership is Arabic in culture. The official language of Iran is Persian and they do not consider themselves to be Arabs. Islam is obviously an Arabic influence, but the Persians distinguish themselves from Arabs just like the Turks and other non-Muslim Arabs. Iran has strained relations with Saudi Arabia and other Arab governments in the region. The Iranians are certainly Islamic fanatics, but they are Persian Islamic fanatics.
The average Iranian in the streets considers the dictatorship to be too 'Arabic' in culture, they may speak Persian/Farsi but they aren't Persians in culture. The regime does not embrace Iran's history or culture, they embrace an Arabized version which is post-Arab Invasion. Most Persians admire the pre-600 A.D. era when there was the Persian Empire - Cyrus the Great, Darius the Great, Xerxes, etc. Something shunned by the current regime.