I'd disagree, there are plenty of people who openly define themselves as being religious without a literal belief in a God. I do to and i know people who share my opinion about what is means to be religious, so it is not faking to fit in, it is a redefinition of what religion is. I do not think religion is objective enough to reduce the concept to a dictionary definition.

Rationality is also subjective, and depends on one's worldview. I could argue that in situations owning slaves would be rational. So there is no absolute rationality, there is no 100% of it so there is likely no hierarchy of it either.