Dictatorship is dictatorship, tryanny is tryanny. This 'western cultural bias' bull is nothing other than an attempt by dictators to suggest that the people living (mostly unwillingly) under them are less interested in democracy than people 'in the west'.
If that's truly the case, then hold a genuinely free and fair election and the Mullahs should have no trouble getting reelected.
Asserting that there is no "western cultural bias" is merely to assert its hegemony, as the presumed norm, in this case to say that for a country to assert their own norms is tyrrany, and our own liberation.