Adding a bit to that, it's very likely that the old judaic religion was polytheistic like every other in the nearby region (assyrians, babylonians, egyptians, hittites), but started to consolidate around a single deity (not clear when, the tradition was oral). That meant some stories were left out for whatever reason, others changed, as they did several times over the centuries before being written, and every other god of their pantheon became yaweh, which explains why he has such drastically different personalities in the bible