This forum has many members who are professed atheists, agnostics, and people who profess many faiths other than Biblical Christianity. JCF, unlike other Christian message boards does not limit membership based on adherence to a specific set of doctrines or dogmas.
That said your opinion of the Bible is just that, your opinion. And so far all you have demonstrated is an ignorance of what the Bible teaches as you have decided to take the historical accounts of the Hebrews as indicative of God's moral teachings.
Jesus was a prophet sent to a minor province of the Roman Empire so when you demand proof He existed based on contemporary accounts and then decide (based on only you know what) that the 4 Gospels were written 130 years after there recorded events you demonstrate you are not interested in learning but judging what you refuse to study to understand.
You want scientific proof for the existence of God, when science is nothing more than evolving human knowledge interpreted by men who lack a full understanding of our physical world. Although knowledge has increased mankinds understanding of the world we live in is still incomplete and is no different than the world of those men who wrote the ancient book you are seeking to denigrate. The world has not changed, cultures have changed how we live based on what we have learned about. Science has become the god of a materialistic world that views rational thought as the epitome of the goal of humanity.
However, all you are appealing to are theories that cannot be proven. Where is the proof for the Big Bang, an expanding universe, macroevolution, and all the other "rational scientific" theories that have no real evidence that can be duplicated in any laboratory? You denigrate blind faith and then put blind faith in mankinds "rational thought" processes. These "rational thought processes" have given us the atomic bomb and other weapons of mass destruction. Rational human beings are destroying the world we live on.