Original sin reflects original misanthropy of miserable mean-minded misanthropes who continually tried to make humanity look worse than it is . Most of us most of the time are good as Albert Ellis notes in " The Myth of Self-Esteem."
Those mendicants of misanthropy made up their history and their code of ecthics from their own miserable mean-mindedness and tastes and whims; not Yahweh, their fictional God who gave us morality.Humankind depends on no progressive code of ethics from God but instead from trial and error, refining their moral sense.
Judaism itself poses no original sin! Buddhism poses original ignorance as it were.