I did not mention the golden rule and never claimed it to be unknown until the bible recorded it. I have actually said the exact opposite.
1. All men are born with a God given conscience. We generally believe the golden rule however the Golden rule is not true unless God exists to ground in a transcendent foundation. Without God it is merely a preference and not actually true.
And what makes you say that? Why is it not enough to say that hurting others is wrong in itself because we're all people, and we all do not want bad things to occur to ourselves? This isn't something observed purely in humanity. All other higher-mammals have an inclination not to harm their fellows outside of disputes over food, mating & territory(which really is just the first two writ large). I think that alone is reason enough to suggest that morality is something inherent to our condition, and that we created God(s) and religion(s) to explain it to ourselves.
2. The bible does not bring morality reality into existence by declaring it. It does however justify our inclinations about moral issues and places them onto a logical context by which they may be true.
Would it not be possible that it was the other way around? We are inherently moral and thus our religions would develop accordingly. Morality does not need to derive from a God or Gods, because whether or not there is or isn't we
do exist and we do live, and because of that we are concerned with the welfare of our fellows so that we may be happy, safe & comfortable.
You are never going to answer a single question I ask are you. I did not ask anything about the golden rule.
We inherently care for each others at times, kill each other at times, eat each other at times, enslave each other at times, etc......... Here is the problem. Without God there is no standard by which we can know which one if any of those inherent behaviors are good and which are evil.
You asked about morality, of which the Golden Rule is an example of. An example that is found in all cultures and faiths, independent of each other, and more importantly for this discussion independent of the Abrahamic tradition.
I might be mistaken, and if I am then tell me, but you're positing that without God there is no reason to uphold morality, because somehow without a greater-than-human(or atleast non-human) font for which morality to spring it has no meaning. But that doesn't make sense. It's a trait found in all humans through all periods of time in all parts of the world. You can justify it from a purely material perspective, it holds exactly the same weight as the assumption it is derived from a divine source.
If there were a clear dividing line between atheist/non-Christian individuals being
worse than religious people/Christians you might have a point to work with. But that isn't the case. Atheists/Non-Christians and Religious/Christians are just as good and just as bad as one another. Terrible people will be terrible with or without a God, and good people will be good with or without a God.
Does that make it subjective? Somewhat, yes. But it's subjective to both sides. There are just as many saintly non-Christians as there are deplorable Christians.
Are you ever going to answer any question I ask or demonstrate anything I request?
How am I not giving you an answer?