So a being that is perfectly good can create evil and still be perfectly good? Like I said above, perfection is going to be easier to attain than I thought ;)
Im not agreeing that objective morality exists. Im asserting that absolute moral law is decreed by God. It is not objective.
No, I'm not saying that the substance of it is objective, but that the fact of its existence is objectively true. I mean, either it is or it isn't - forget about what it is, surely you believe that it exists in an objective sense. After all, if you're proposing that the existence of God's law is only subjectively true, this will be a much shorter discussion than I thought ;)
He also created beings with free will and communicated His will through His Word which encompasses His moral law. The knowledge of good and evil was not intended for all the beings with free will. But having obtained that knowledge, man now has the duty of the moral law.
And all of this is on top of societal laws to which must also comply (and hope are compatible with the absolute moral laws of God.)