Sunnis make up about ninety percent of Muslims. They believe that the succession of caliphs was proper after Mohammed died. The Shiites believe that the rightful successors descended from Ali, Mohammed’s cousin, not his best friend, Abu Bakr. They believe that the rightful descendants have been assassinated and discriminated against ever since.
“Sunnis tend to be more conservative and they don’t believe in a clergy or a liturgy. The only countries with Shiite majorities are Iran, Iraq, Lebanon, and Bahrain.”