Both Uses

dogmatic
in
A Prayer for Owen Meany
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He was my best friend, and with our best friends we overlook many differences; but it wasn't until we found ourselves attending the same Sunday school, and the same church, that I was forced to accept that my best friend's religious faith was more certain (if not always more dogmatic) than anything I heard in either the Congregational or the Episcopal Church.†
p. 25.3
Owen's opinion of Pastor Merrill had improved considerably from those earlier years when the issue of the minister's doubt had bothered Owen's dogmatic side; Mr. Merrill had to be aware—awkwardly so—of the role The Voice had played in securing his appointment as school minister.†
p. 391.1 *

Definitions:

(1) (dogmatic)
prone to stating opinions as absolute truth
(2) (meaning too rare to warrant focus)
More rarely, dogmatic is also used as the adjective form of dogma to indicate that something is related to or expresses standard beliefs that shouldn't be questioned -- especially religious beliefs.