Can we talk then about a religion as nationalism? For example, there is a book Kingdom Coming: The Rise of Christian Nationalism, by Michelle Goldberg. I recommend to google for its reviews.
I just saw a much less polite article on "crackpot christianity", but along similar lines. Here is one of the quotes it quotes:
With or without religion, good people can behave well and bad people can do evil; but for good people to do evil - that takes religion. ----- Steven Weinberg
both are virtual forms of identity, and while both can be life-enhancing in moderation, thy also both become deadly in excess.
once you've decided upon authenticity, isn't the next step upriver identity? ~"When an inner situation is not made conscious, it appears outside as fate." Karl Jung~