There has been some discussion about this spread across multiple threads. Let's centralize those discussions here.
Cassiad4 issued this challenge:
"Do any of these followers of this god dare to say that their god is WRONG and that god endorses something which is evil?"
So far as I know, none have stepped forward though several have made claims they believe make it so that the slavery was not "evil" such as "slaves were not kept longer than seven years", "guidelines regarding the treatment of slaves that were far more advanced in thought than neighboring countries", they weren't really "slaves" as there were in the US, etc. Somehow they have been unwilling to condemn that which should be condemned. What's worse some of these claims appear to be false or half-truths based on Wiki and Leviticus:
The following from Leviticus covers Jewish slave in 39-43 and non-Jewish slaves in 44-46. It seems Jewish slaves fared much better than non-Jewish slaves who could be kept as permanent slaves and did not have the protections of Jewish slaves and could be "ruled with severity". Regardless, it is clear that insofar as God dictated Leviticus, God endorsed slavery.
39‘If a countryman of yours becomes so poor with regard to you that he sells himself to you, you shall not subject him to a slave’s service. 40‘He shall be with you as a hired man, as if he were a sojourner; he shall serve with you until the year of jubilee. 41‘He shall then go out from you, he and his sons with him, and shall go back to his family, that he may return to the property of his forefathers. 42‘For they are My servants whom I brought out from the land of Egypt; they are not to be sold in a slave sale. 43‘You shall not rule over him with severity, but are to revere your God. 44‘As for your male and female slaves whom you may have—you may acquire male and female slaves from the pagan nations that are around you. 45‘Then, too, it is out of the sons of the sojourners who live as aliens among you that you may gain acquisition, and out of their families who are with you, whom they will have produced in your land; they also may become your possession. 46‘You may even bequeath them to your sons after you, to receive as a possession; you can use them as permanent slaves. But in respect to your countrymen, the sons of Israel, you shall not rule with severity over one another.
Can there really be any circumstance under which slavery is not condemned?
Are there any Christians who will condemn God's endorsement of slavery?