You’re right. My brain kind of skipped a bit on the fact that what we call the Old Testament is also an accumulation of texts from a larger timespan.

I was under the impression that all of that was more a tribal thing. This is the story of the descendants of Jacob, the Israelites, Samaritans etc. Versus Babylonians, Egypts, Assyrians… And group identity was very important. You can’t rob your direct neighbor who is part of the same group. That would leave everyone in anarchy and chaos, not a somewhat stable society. So instead you burgle rivaling groups of people, steal their food, donkeys, women, and make them your slaves. It’s not really about ethnicity or religion. All of that is more a means of having a strong cohesion within your group and have them fight against the rivaling groups, not amongst themselves. Or a stronger group will take your things. Tribes also are friendly towards some other tribes and might share a common enemy. The content of the stories and traditions isn’t that important, but it’s what makes you distinct from your rivals, regulates who you’re allowed to enslave and gives a feeling of belonging to your group and also reassures you that you’re right. But in my view it’s more a means of forming stable tribal structures, and not a cause of something. I’m not a historian, though.