If you want to have this discussion, you should illustrate the conflicts between different religious authority based moralities. Does different Gods actually yield different objective moralities, or is this a strawman argument?
Supposedly, God is the wisest being in the Universe, is perfectly moral, and all powerful, omnipotent. If so, God would do a better job of creating this world than God does. Various arguments by theists have been made. God values our free will. If God is omniscient and creates the world, God will have to choose an initial state of creation, which will unfold in a determinate fashion. Free will is impossible.
All moral evil is due to God's choice of which possible world God will actualize.
Put My Spirit In
Ezekiel 11:18-20
Ezekiel 36:26-28
Jeremiah 11:6-7
Jeremiah 31:31-34
Jeremiah 32:38-40
1 Corinthians 1:21-22
Ezekiel 11:18-20
18 And they shall come thither, and they shall take away all the detestable things thereof and all the
abominations thereof from thence.
19 And I will give them one heart, and I will put a new spirit within you; and I will take the stony heart out
of their flesh, and will give them an heart of flesh:
20 That they may walk in my statutes, and keep mine ordinances, and do them: and they shall be my people, and
I will be their God.
Ezekiel 36:26-28
25 Then will I sprinkle clean water upon you, and ye shall be clean: from all your filthiness, and from all
your idols, will I cleanse you.
26 A new heart also will I give you, and a new spirit will I put within you: and I will take away the stony
heart out of your flesh, and I will give you an heart of flesh.
27 And I will put my spirit within you, and cause you to walk in my statutes, and ye shall keep my judgments,
and do them.
28 And ye shall dwell in the land that I gave to your fathers; and ye shall be my people, and I will be your
God.
And the Bible tells us God will indeed create us moral beings, so the free will defense is hogwash.