schismatic
adjective
[ skɪzˈmatɪk ]
• characterized by or favouring schism.
• "schismatic religious movements were gaining currency"
schismatic
noun
• (especially in the Christian Church) a person who promotes schism; an adherent of a schismatic group.
Origin:
late Middle English: from Old French scismatique, via ecclesiastical Latin from ecclesiastical Greek skhismatikos, from skhisma (see schism).