Complex sentence: He was hoping to rule Basra or to rule Iraq, so, he was against Faisal I, being the King of Iraq, with Khaz'al al-Ka'bi and Arnold Wilson supporting al-Naqib.
Split into simpler sentences: He was hoping to rule Basra or to rule Iraq. Therefor, he was against Faisal I, being the King of Iraq, with Khaz'al al-Ka'bi and Arnold Wilson supporting al-Naqib.