In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

A practicioner of the branch of Islam that regards Ali as Muhammads first true successor is?, Context: Ottoman Sultan Selim the Grim, regarded the Shia Qizilbash as heretics, reportedly proclaimed that "the killing of one Shiite had as much otherworldly reward as killing 70 Christians."
Shiite