How would you explain morals? How do we conceive of what is right and wrong? How do we have opinions about this being right, but someone else thinking it is wrong.
Let us pretend we all are creationists. If there was a creator who is perfect, would it not make sense that He would give us a conscience, knowing right and wrong. A sense of morality.
Yes, that would make sense. So why didn´t it happen?
You already said it for yourself: we have opinions about this being right, but someone else thinking it is wrong.
How can that happen, when you have a perfect sense of right and wrong, given to you by the perfect creator?
For instance, killing is not right, and stealing is not fair nor trustworthy. Speaking what is not true about another is malicious and slanderous.
Except, of course, when God - or another authority which you accept speaks for God - command you to, isn´t it?
Consider you are a soldier in King Saul´s army... and your commander tells you that God commands you to go a slaughter all the Amalekites. Men, women, children, livestock. Kill them all. Leave no one alive.
Killing is not right, so your conscience tells you. Does it?
Would it not make you mad if someone made all kinds of untrue slanderous comments about you? Does not the God in the bible have a personality of anger, howbeit pure righteous anger.
What of other emotions? Love, lust, longing for a loved one who is far of. Does not God long for us, to know us, to reach out and let us know that He exists. He sent His Son, gave us the bible, and told us of His Son in the bible.
I fear that I cannot follow your reasoning. Note: I understand it, but I cannot accept it.
You conclude that, because humans behave in a certain way, God must have created it in this way, and because God behaves in a certain way, certain acts must have happened.
But this reasoning is not conclusive. It is also not compatible with some biblical statements, such as "God´s ways are not our ways".
You cannot have it both ways. If God acts like us, and God does not act like us, it is not possible to make any statements about God´s behaviour. That would be... paradox, at least, if not contradictory.