In religious or political groups bound by shared belief, belief itself is typically tied to social status. From medieval Christianity to modern North Korea to every hardline cult you can find, the coolest way to be cool is to talk about how great the leaders and their ideas are and how awful the out-group is, and the fastest way to get yourself in big trouble is to openly question those ideas. The specifics vary but the concept is the same: the social environment incentivizes ideological conformity.
