Because of the long conflict between Israel and Edom, one might think that Obadiah would gladly predict the Edomites' downfall, yet he laments Edom's horrible end.
The prophet Obadiah sorrowfully dramatizes God's judgment upon Edom (Esau) for his hatred, haughtiness, and pride, and how and why Edom will be annihilated.
Haman was the treacherous offspring of King Agag, and Mordecai was the godly descendant of King Saul. Their pairing in Esther provides a sequel to I Samuel 15.
As the Good Samaritan took pity on what normally would be his adversary, we are obligated to be sensitive to the needs of those around us, enemy and friend.
The book of Amos is addressed to the ones who have made the new covenant with God. Having made the covenant, we must remember that privilege brings peril.
Parts of God's law are not presently required, yet not 'done away." Paul took a vow that required animal sacrifice. Ezekiel 34-48 shows the sacrificial law observed.