I think readers will understand that an article about a particular religion will be primarily about the religion as seen in its own lights. If I am reading an article about a religion, and it says what the fate of the righteous will be, I know perfectly well that I am talking about what that religion thinks it will be. The description is factual: we are saying what actually are the beliefs held on the subject, not whether the beliefs are correct. The requirement for NPOV is a requirement that the beliefs be accurately described.
The attitude that others take towards these beliefs needs discussion, but this should be separate from a coherent presentation of what the beliefs are. This too is factual.
There is obviously a ned for a general statement at the beginning for orientation: just whose beliefs they are, and the source they are taken from. I do not think it was intended to suggest that every sentence be qualified--that might reasonably be taken as offensive--and I suggest would seem excessive in any article, no matter how objectionable the view being presented.
A reminder every section would seem reasonable.
DGG