Let's start with eliminating everything we "know" and rebuild our understanding. Let's start with a few assumptions:
- There is a god.
- God created the universe we know.
Okay, with that little bit, what do we know? Who are "God's People"? If god created Adam and Eve, then god created the first people (who would, over time, be the ancestors of the Jewish people.) Did other gods create the other people, or are Adam and Eve the first humans anywhere on the planet? If they are the first humans anywhere, then god is the god of all people, not just one group of people. Other people believe their god created all people. In order for that to be true, the one god showed up in different areas describing the creation differently. Can that be possible?
Perhaps. If we talk to a group of scientists, we would use stories and analogies that are scientific in nature. If we were to talk to a bunch of pre-schoolers, we would use different stories. Same is true if we were to talk to artists or truck drivers. The examples we would use when we talk to a group of people is going to be different. The message might be the same, but the examples and terminology would be something that would suit the audience.
It would stand to reason that a god would use different examples and phrases for different groups of people. It would stand to reason, then, that there might just be one god who created the universe and all of the people in it. We have different images of who god is because the way god talked to us is based on the language and examples we understand.