Do you need salvation?
Do you need to feel separate from another group of people?
In my life experience, these two questions are inextricably linked, the first being a more polite way of asking the second. Salvation is exclusive. It is necessary that it be exclusive to be attractive. The idea of salvation sets up the "Us vs. Them" paradigm that is necessary for manipulation and control of groups of people. Salvation creates the opportunity for judgement.
Without judgement there is no need for salvation, and thus we have the first foundational principle of religion. Without salvation, judgement is irrelevant to the judged. Fear is the result of judgement and salvation. Fear is the bridle and reins of those in power.
In Christianity, you should fear death a little. When you die you will meet Christ, who is supposed to be your salvation, but thought you think you are saved you might not be. "Work out your salvation with fear and trembling". All that wraps it up nicely with a bow.
You're not saved?!? Be afraid. Be very afraid. Hell fire and damnation awaits!
Oh you are saved?!?! Are you sure? Are you really sure?! Are you really, really sure?!?!
Fearful people are easier to manipulate and control.
But hey, it's not all bad. At least you're not one of 'them'!
Round and round it goes. Scripture does the same thing. It is a circular system filled with circular logic.
Maybe there is a god. I will not argue against the possibility of a god. I do however argue that any one modern group of people have a comprehensive understanding of that god and the best or only way to interface with that god.