What issue divided shiite and sunni muslims? whether the hajj is mandatory whether jesus was the messiah how non-muslims should be treated how leadership should be passed down?

I believe the answer is: how leadership should be passed down

Sunni Muslim beleived that all people can be appointed into leadership as long as they do not violate the core rule held in Muslim belief. The Shi'ite on the other hand believe that the only people that could be elected as leaders are the descendants of Muhammad.

what words? are you talking about to complet what sentence