In the book Uncle Tom's Cabin what is Augustine’s opinion of the religious leaders who claim the Bible supports slavery?

Augustine points out the hypocrisy of religion supporting slavery,

"Shocking! it's the truth. This religious talk on such matters,—why don't they carry it a little further, and show the beauty, in its season, of a fellow's taking a glass too much, and sitting a little too late over his cards, and various providential arrangements of that sort, which are pretty frequent among us young men;—we'd like to hear that those are right and godly, too."