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Some men are Baptists...others Catholics...My father was an Oldsmobile man.
— Ralphie · A Christmas Story
Behind the line May contain spoilers.
Our reading
An editorial interpretation.
Loyalty gets described like religion here. The speaker lists denominations people belong to, then slips in a car brand as if it were another faith. The joke is treating devotion to a brand with the same solemnity as belief, in a deadpan tone.
Context reviewed