Christians Impaled on the Horns of a Moral Dilemna

Take for instance chapter eight in The Christian Delusion written by Hector Avalos. He argues that Yahweh is a moral monster, contrary to Paul Copan.

Here then is the dilemma: The Christian thinks there is an objective absolute morality that stems from their perfectly good God, which is both eternal and unchangeable. But the morality we find in the Bible is something quite different than what they claim. Morality has evolved. What we find in the Bible is not something we would expect from a perfectly good God. So Christians must choose, either 1) hold to a philosopher's god divorced from the historical realities of the Bible, or 2) continue to worship a moral monster.