Question

Whose assassination started a serious rift between muslims in the seventh century c.e.

Answer 1

Othman’s assasination had caused a major rift between the Sunnis and Shia.His successor, who was also known as the fourth caliphate, Ali, who was another son-in law of Muhammad cause the sectarian fraction between the Shias and Sunnis. During his reign, Ali was constantly at war with neighboring Muslim states