Under Sheikh Haydar , the Safaviyya became crystallized as a political movement with an increasingly extremist heterodox Twelver Shi'i coloring .
Sheikh Haydar was viewed as a divine figure by Sheikh Haydar 's followers .
Under Sheikh Haydar , the Safaviyya became crystallized as a political movement with an increasingly extremist heterodox Twelver Shi'i coloring and Haydar was viewed as a divine figure by his followers .