sectarian

adj. narrow-minded, having a limited perspective; belonging to a particular sect or faction

n. member of a sect or faction; narrow-minded person, person with a limited perspective

The ideological underpinnings of attitudes and behaviors labeled as sectarian are extraordinarily varied. Members of a religious or political group may feel that their own salvation, or success of their particular objectives, requires aggressively seeking converts from other groups; adherents of a given faction may believe that for the achievement of their own political or religious project their internal opponents must be purged. Sometimes a group feeling itself to be under economic or political pressure will attack members of another group thought to be responsible for its own decline. It may also more rigidly define the definition of "orthodox" belief within its particular group or organisation, and expel or excommunicate those who do not agree with this newfound clarified definition of political or religious 'orthodoxy.' In other cases, dissenters from this orthodoxy will secede from the orthodox organisation and proclaim themselves as practitioners of a reformed belief system, or holders of a perceived former orthodoxy. At other times, sectarianism may be the expression of a group's nationalistic or cultural ambitions, or cynically exploited to serve an individual demagogue's ambition.
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Noun
1. a member of a sect; "most sectarians are intolerant of the views of any other sect"
(synonym) sectary, sectarist
(hypernym) bigot
Adjective
1. of or relating to or characteristic of a sect or sects; "sectarian differences"
(pertainym) faction, sect
2. belonging to or characteristic of a sect; "a sectarian mind"; "the negations of sectarian ideology"- Sidney Hook; "sectarian squabbles in psychology"
(antonym) nonsectarian, unsectarian
(similar) denominational, partisan

(n.)
Pertaining to a sect, or to sects; peculiar to a sect; bigotedly attached to the tenets and interests of a denomination; as, sectarian principles or prejudices.
  

(n.)
One of a sect; a member or adherent of a special school, denomination, or religious or philosophical party; one of a party in religion which has separated itself from established church, or which holds tenets different from those of the prevailing denomination in a state.
  

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