Ill take a more accurate site: http://www.globalsecurity.org/military/world/iran/groups.htm "The Persians account for slightly more than half the population of 70,000,000..." "Many ethnic Arabs live in the southwest, and one of their major grievances has been that although much of the country's oil wealth comes from this area, they do not benefit from it. They have also complained of underdevelopment, discrimination in securing jobs, and poor educational opportunities." So if they are roughly half the country, why can only they rule? And why are they allowed to discriminate and murder the minorities there?
Quote from your more accurate site. Your "more accurate" site gives exactly the same figures as Wikipedia, 65% Persian. You don't think your "more accurate" site gets their data from Wikipedia do you? The minorities in Iran, including Jews, are protected by the constitution and represented in Parliament.