Allport explained religious prejudice through personality fit rather than doctrinal belief

Evidence

To explain this paradox, Allport made a distinction between different ways of being religious – not between different religious beliefs but between different ways that religion can fit into the character or personality of the individual. — John F. Dovidio, Peter Glick, Laurie A. Rudman, On the Nature of Prejudice, 2528

Categorization

• DEFINE: This introduces the key distinction — later formalized as intrinsic vs. extrinsic religious orientation — between how religion fits a personality rather than what is believed.