Freedom44 is correct. Many Iranians (Persians) do not consider themselves to be Arabs. Some were very gracious and polite about telling me so a long time ago.
Freedom44: May we call the evil, despotic leaders "Arabs?"
[Little simple American humor there.]
Actually some of the main directors of the regime are from Arabic lands like Iraq.
The head of the judiciary is an Iraqi Mullah. And remember, those Mullahs who wear Black turban do not have Iranian ancesstors. Their ancestor is their prophet, Muhammad.
Any way, there are lots of differences between the people and the mullahs government.