Word for unquestioning belief/opinion.... Doctrine? Ideology? [duplicate]
Solution 1:
Here's what you might want -
Dogma
: a principle or set of principles laid down by an authority as incontrovertibly true.
"The dogmas of faith"
(From Oxford)
Solution 2:
The word zealot comes to mind.
Zealot - a person who is fanatical and uncompromising in pursuit of their religious, political, or other ideals.