Carpenters beef is with the historical-grammatical hermeneutic as opposed to the historical critical method. But these are not necessarily mutually exclusive interpretations of the text. The histo/grammatical one is more devotional while the histo/critical more focused on sources.
However, Carpenter objects to proof texting, and proposes to discredit the histo/gram hermeneutic by using slavery as an example of its weakness.
First, it should be noted that Christ and Paul used proof texting when speaking to those they wished to convince of truth: (Luke 24:27: And beginning with Moses and the Prophets, he explained to them what was said in all the Scriptures concerning himself. See also especially Romans 9-11. The book of Hebrews as well). They were proof texting. So, the method is not without precedent.
Second, if you just focus on the texts addressed to slaves, you do not see how radical Paul’s suggestions to masters were: Eph 6:9. “And masters, treat your slaves in the same way. (That is, use the golden rule). Do not threaten them since you know that he who is both their Master and yours is in heaven and there is no favoritism with him.” Wow! Watch out masters!
And Paul did not forbid seeking freedom. ! Cor 7:21. And as was noted, Gal 3:28 says that in Christ, there are no slaves etc.
Third, the pro-slavery book. Again, it was an unbalanced presentation. Was there mention of the way masters should act? If you are going to quote scripture on a topic, better quote all, including Gal 3:28. And to not do so shows hypocrisy. Our pioneers saw that there were deeper principles involved and so acted accordingly.
And I find it interesting that no one is quoting from Philemon where Paul addressed the issue head on, and proposes freedom for the slave!
And finally a quote from “Does the Bible’s New Testament Endorse Slavery?” By Jon Davis:
It does not….
Instead, we see recognition in Colossians 3:22–35 and in 1 Peter 2:18–25 that slavery amounts to hardship. The hardship might be self-inflicted debt payoff, but it is always a loss of freedom and liberty for the slave. There is simply no reference in the Bible to suggest that slavery in general is a good practice that God condones or supports. The Bible merely acknowledges the fact that people are in the situation of slavery, and points out the character of God despite these hardships.