And of course as people became more numerous and larger tribal groups emerged each would develop their own gods and then we have the My gods are more powerful than yours scenario.

From that the gods belonging to the strongest tribe become the all powerful gods, Israel decided on only one which eventually became the god, had his 'son' not been adopted by the Romans, Christianity would no doubt have disappeared to all but a few in a fairly short space of time.

It is amusing to hear atheists challenged by Pascal's Wager, "What if you are wrong" from a person who is only a christian because of their upbringing.

The answer to it is "What if you are wrong, you die and find you are in front of Zeus (or any one of a large number)".