A person who rejects adiaphorism, the belief that certain religious practices are morally neutral or indifferent.
From 'anti-' (against) + 'adiaphorist' (from Greek 'adiaphoros' meaning indifferent), formed in Protestant theological debate (16th-17th centuries).
The adiaphorist debate was fierce during the Protestant Reformation—theologians argued about whether things like what you wore to church or certain rituals mattered morally, and antiadaphorists insisted they absolutely did.
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