The god from the Bible is not good and loving
Are we assuming the biblical god is true for this argument?
We can grant that he exists, but it’s not necessary. Voldemort is evil and not real.
If you grant that, then you have to grant that he created morality. Saying "the biblical god is not good and loving" when the Bible describes him as all good and all loving is self contradictory. If he created morality/is described as all good and all loving in the bible, then despite what you think, he is all good and all loving.
No, granting that the biblical God exists does not mean granting that he “created morality” or that every description of him is true. That’s the claim being evaluated. “The Bible says God is all good, therefore he is all good” is circular reasoning. I can grant Voldemort exists within Harry Potter without granting that every character’s opinion about him is correct. My argument is that the actions attributed to God by the Bible conflict with the Bible’s claim that he is perfectly good and loving. That’s not self contradictory; it’s an internal critique.