I agree that about God and slavery.
God counts slavery as one of the sins that He promises to not overlook when it comes time to judging us.
Can you provide the citation on that one? Do you consider that slaves held by Abraham, Isaac and Jacob were not really slaves? Was Philemon condemned by Paul when Onesimus was his slave? I have no desire to defend slavery as an institution, but when you invoke God’s authority, you should cite His Word.