I'd be more concerned with Balochi independence rumblings.
It's convenient in the US to assume that other countries that aren't notoriously multiethnic are somehow more reasonable about it than in the US. Some exceptions are remarkable: Sudan, Rwanda, Congo, Israeli, Iraq, Russia, Yugoslavia (and, oddly, the list is quite long even though the impression I get is most people think it's quite short).
Iran is a salad bowl, one that shares many of its ethnicities with neighboring countries, and its borders are simply the result of imperialism and conquest--some theirs, some Arab, some by others (including, of course, Westerners). Azeris are numerous, Arabs are numerous, Balochis are numerous, Turkmen and Kurds. Then there are the minorities encompassed entirely by Iran.
They keep a lid on it by a combination of local ethnic rights and out-and-out oppression. The balance varies quite a bit. Currently there's an armed militia in the Balochi regions that kills from time to time; the assumption by some DUers is that it's somehow a CIA operation, even though it's a dead-ringer for the same kind of movement going on in Pakistan, one that seems to be allowing the Afghan Taliban to operate out of Quetta. In other words, we joyfully posit two variables when one will account for all the data just fine; Occam would not be amused. The Arab minority is a thorn in the Persians' side; the Persian news media is a thorn in al-Jazeera's side because the Arab-language broadcast network tends to be the mouthpiece for the Iranian government concerning most things Arabs. In other words, when it comes to reporting on Iran, too often AJ winds up airing Iranian Arabic-language footage instead of re-reporting on some Persian original.
Useful map from one of my favorite websites: