What's the adjective for sectarian? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs sectarianize and sectarianise which may be used as adjectives within certain contexts.
“Such a presentation must be scrupulously neutral about private sectarian beliefs held by a group.”
“It allows just so much freedom of thought as is calculated to encourage the doubts natural to such men, while it demands the most sectarian adherence to its exclusive dogmas and practices.”
“Each religion educates its young in a sectarian way, for religionists believe that to learn one specific path is sufficient and necessary.”
sectarianized
simple past tense and past participle of sectarianize