sectarian
adjective
[ sɛkˈtɛːrɪən ]
• denoting or concerning a sect or sects.
• "the city's traditional sectarian divide"
sectarian
noun
• a member of a sect.
• "a Jewish sectarian who preached the redemption of the Gentiles"
Similar:
separatist,
dissenter,
dissident,
nonconformist,
free thinker,
renegade,
disruptor,
recusant,
schismatic,
revisionist,
unbeliever,
sceptic,
agnostic,
atheist,
non-theist,
zealot,
Young Turk,
extremist,
radical,
activist,
militant,
bigot,
dogmatist,
partisan,
devotee,
Origin:
mid 17th century: from sectary + -an, reinforced by sect.