The Old Testament "God" is an invention of the Israelites that helped ensure they maintained their national identity. After being conquered and occupied over and over again some device had to be manufactured to make sure the Israelites where not simply absorbed into the nations that were their rulers. It worked quite well.
Here's the rundown -
- Israel is God's/YHWH's chosen people.
- One day God/YHWH will send a messiah/promised deliverer to free Israel from captivity.
- That messiah will set Israel up as the ruler over all other nations.
- All Israel has to do is faithfully obey God/YHWH and keep their language/customs until that day comes.
So, yes, the god of the Bible is rather partial. He is the god of the Jews first and foremost. He is not Jesus and Jesus is not the god of the Jews. Jesus is not even the foretold messiah.