Complex sentence: Supporters of his actions portrayed Morrison as devoutly and sincerely sacrificing himself for a cause greater than himself; in Vietnam, Morrison quickly became a folk hero, his name rendered as "Mo Ri Xon".
Split into simpler sentences: Supporters of his actions portrayed Morrison as devoutly and sincerely sacrificing himself for a cause greater than himself. In Vietnam, Morrison quickly became a folk hero, his name rendered as "Mo Ri Xon".