Who said Genesis was written or told by Abraham (or your other demigod, Moses)? I certainly did not. I said:

Genesis is one of millions, and plagiarized from several myths formed thousands of years before your demigod, Abraham, was even born.

Genesis is a creation myth, just like those it was based on, (and those millions of others it was not based on).

The point I think you might be trying to avoid is that it is a myth. The thing is, Days...just because someone chose to put that myth in writing, or that someone later printed that myth in books by the thousands, or that millions of human beings were tortured or killed who refused to believe that myth and the other myths in that horrid, destructive book...

...does NOT mean it's any more true or valid than the millions of other myths that came before it, during it, or even after it. In fact, I'd be tempted to say that it is a pretty shitty myth since it elevates human males above all other life.