The burden of proof is on the person claiming that, " humans are morally flawed, commit moral sin, cannot make utopia, and destroy each other, particularly when we behave apart from scripture, and godless?"
While I do agree that humans can be flawed, that we do have a tendency to destroy each other and that we cannot make utopia given that we can't all agree what utopia would actually be, I definitely don't agree that if we all just believed and followed the Bible that it would get us any closer to any of those things. I see no reason to believe that, and history doesn't bear that out either.
The part I had the biggest problem with is the part I bolded for you. First of all, "godless" people do not behave any more or less morally than anyone else. Secondly, I don't know why you find scripture particularly moral given that it condones slavery, genocide, the murder of witches, gay people, and unruly children, among other things. I could argue that we are more moral as a society when we don't follow such dictates from in the Bible. Do you think the US was behaving morally when they had forced slave labour? Do you think it's moral to kill gay people? I don't. How about all that time the Catholic Church dominated the world and killed thousands of people for heresy and witchcraft all based on Biblical interpretations? Would you say that's the most moral time period in human history? I wouldn't.
Who cares about some "near-universal opinion" ancient or otherwise, about opinions of the Bible that have changed over time anyway? How does that have any bearing on anything? Muslims don't share the same opinion. They have a different holy book. Lots of people follow the Quran and think it's morally superior to godlessness or whatever. Does that make it true?