I even gave scripture to show that American slavery did not constitute what was slavery in the Bible times.
And I easily refuted that Scripture, which as I said were admonishments over "menstealers" not "slavemasters".
Slavery in "Bible Times" varies from Israelite slavery practices to Egyptian, Macedonian, Phoenician, Roman, Persian, Assyrian, Nubian, Turkish, German, Celtic, etc.
Of those American Slavery is similar to Roman, Egyptian, and Greek. The New Testament was written in the Roman Empire. It was directly written in the context of Roman, Greek, Egyptian, Persian and more cultures all of which practiced slavery. And in some instances the slavery was practiced like in America and in other it was practiced as it was in Greece where some slaves were educated. In ALL instances God instructs slaves to be dutiful to their masters and masters dutiful to slaves.
Philemon himself was likely a Greek slavemaster while Onesimus was likely an agricultural slave, with an outside chance of being a Helot slave.