Is it true that there is no absolute morality?

[Neo-Scholastic]

-as his from ours is subjective.  Something doesn't become objective "because goddidit" - that's not even remotely what that word means, even if that's -all- you're using it as a stand in for....which is pretty clear at this point.  

Right. What Steve is arguing for is not moral objectivity, but theological relativism. It's odd because it doesn't seem that his God is really capable of adding anything to our concept of "Goodness." Goodness is a property that is intrinsic to certain objects or facts... or it is not. God cannot "make" anything good unless it is already assumed that God or his actions are intrinsically good... which is the very point that God is supposed to be necessary to explain. It is nothing but circularity.

Its not that God adds something but rather that God is that something. You should know from your study of ancient philosophy that God is described as 'the Good' a concept repeated in Aquinas's 4W, degrees of perfection.