The abolitionist argument that is most rooted in religion, according to the excerpt, is that <span>God does not consider one race inferior to another. The author clearly states that the color of one's skin is irrelevant when it comes to human relations, and that ultimately, black people should not be slaves merely because they are black - they are certainly not inferior to white people.</span>
The most important benefit of having a difficult amendment process is that it "ensures that checks and balances are respected". Hope this helps :)
He read The Gettysburg adress