Refuting Christians with their Own Bible

[SteveII]

What exactly is God instructing that is immoral? He is regulating a less-than-ideal social system. He does not instruct people to get slaves. Your objection is that he does not forbid it. Then we are right back to the question you refuse to answer: how would a society (such as they had) effect the same goals without this system?

"Your slaves are to come from the nations around you. From them, you may buy slaves." [1]

Pretty plain to me. He's at least instructing people who mean to take slaves to buy them from surrounding nations. How kind.

So you're telling me that your all-powerful source of universal morality can take the time to forbid cross dressing, eating shrimp, wearing clothes of mixed fibers, gay stuff, and boiling kid goats in their mother's milk, but for some reason slavery was just something he had to work around until we figured out on our own that slavery actually isn't OK? Are you listening to yourself? [2]

You serve a god whose best known feature is that he makes ridiculously long lists of tediously absurd rules and forbiddings toward an untold laundry list of behaviors, but the immorality of slavery was given a total miss in both Testaments. In fact, both testaments endorse it openly. What part of that suggests that slavery is against your god's supposed moral system? If your god really is the source of all morals, then there is literally no indication whatsoever that slavery is wrong. [3]

[1] Again, regulating, not commanding. 

[2] Your list was for a specific people for a specific time. You are mixing moral laws with dietary laws with social laws--all of which had their meaning to those people. I am listening to myself. You repeating the objection does not change my answer which I have typed out at least 10 times. No one has yet suggested a method to achieve the same goals in this type of society except the "God could have because...omnipotence" line which is a philosophical cop-out.

[3] The NT does not endorse slavery. Instructing slaves to obey their masters is perfectly in line with the gospel. What was the alternative instruction? "Slaves do not obey your masters"? That would have led to violence and death in yet another society that practiced slavery. There were also references instructing people not to mistreat their slaves/servants. I think it is clear that truly following the NT teachings will convict you of even the most modest forms of slavery. 

Purely a philosophical question: what is the precise problem with this type of slavery (not based on a race having less value)? If you do answer, please address voluntary slavery and if and why that is wrong. I am not saying there isn't a problem, I would just like to hear people articulate it.