Just because people don't know something doesn't mean God exists.
To each to their own, but I'm of the opinion that no God exists - I use to be Orthodox Christian but I found myself questioning everything through puberty and finally became an atheist after failing to validate my religious beliefs.
If we were talking about this in 600BC we'd likely be referring to the Norse Gods like Odin or the Greek Gods.
Furthermore the Bible is full of graphic depictions of abuse and discrimination that should have no place in the modern era, along with multiple contradictory statements and although it makes an interesting novel, I must admit the ancient religions are more interesting to study.
If God exists and the Bible is true as written by the apostles of Jesus then it reasons to stand that God acted multiple times in fits of range by killing a plethora of innocent people. As it stands I could not support that God even if he did exist and would rather side with the castaway 'Morning Star'. That being said I'm prepared for the Gnostics and Biblical Allegorists to counter-attack
Yet you seem to barely consider what God is, at all! For example, imagine that you built a beautiful hous of cards. And you gave it over to your kids who could enjoy its beauty, etc. If they simply crashed it, wouldn't you be upset... and more if they called you name, and despised you rather than honoring youi?
Think of the great God, who went to the trouble of building this gigantic, complex, beautiful universe for us. And then went to all the trouble of building us so that we could recognize the beauty. You respect the cops with guns when they are in your neighborhood in force. And they don't put up with people who mouth off at them. Think of God, who is millions of times more sensitive to honor and name calling then cops are? And yet He puts up with many of us calling Him names and dishonoring Him.
The depictions in the Bible are depictions of what people are doing to other people all around the world right now. It disgusts God. But He knows that if He wants to find a few people to have a good relationship with, He is going to have to put up with a lot of abuse just to find them. The Bible is a record in that way. It isn't what God commands or desires.
If you can't simply take a look at the machine nature of the universe, and realize that machines have makers, you simply aren't looking hard enough.