Original sentence: How much of the population is Arabic-speaking  no one knows for certain, since the Iranian central government does not release any ethnicity-related census figures.If there is prejudice, it would seem unfounded.Some of the Arabic-speaking inhabitants of Khuzestan believe that oil revenues from their province are spent in the Persian-speaking areas of Iran, while they struggle to repair extensive war damage with little revenue or support from the central government.The Khuzestani population, however, is still split between Arabic and Persian speaking peoples.While this may be evidence of that some Persian-speakers distrust Arabs, no academic account of the Iraq-Iran war mentions any minority support for the invasion
Edited sentence: However, no academic account of the Iraq-Iran war mentions any minority support for the invasion.The Arabic-speaking inhabitants of Khuzestan believe that oil revenues from their province are spent in the Persian-speaking areas of Iran, while they struggle to repair extensive war damage with little revenue or support from the central government.The Khuzestani population, however, is still split between Arabic and Persian speaking peoples, no one knowing of a certainty, however, since the Iranian central government does not release any ethnicity-related census figures.To base the article on hearsay.[Interesting that the choice of all links are pro-separatist.[Then if it's not academic, why are you mentioning it