Contradiction with Matthew 5:44
Obadiah 1:20 speaks of the possession and reclaiming of lands, suggesting conflict, whereas Matthew 5:44 teaches to love your enemies and oppose conflict.
Matthew 5:44: But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
Contradiction with Romans 12:19
Obadiah 1:20 involves taking possession, which could imply vengeance, while Romans 12:19 instructs believers to leave vengeance to God.
Romans 12:19: Dearly beloved, avenge not yourselves, but [rather] give place unto wrath: for it is written, Vengeance [is] mine; I will repay, saith the Lord.
Contradiction with Exodus 20:15
Obadiah 1:20's theme of taking over lands could be seen as contradictory to the commandment "Thou shalt not steal" in Exodus 20:15.
Exodus 20:15: Thou shalt not steal.
Contradiction with James 4:1
Obadiah 1:20 describes conflict over land, whereas James 4:1 questions the source of wars and fighting as originating from desires and ambitions.
James 4:1: From whence [come] wars and fightings among you? [come they] not hence, [even] of your lusts that war in your members? [fightings: or, brawlings] [lusts: or, pleasures]
Contradiction with Ephesians 4:32
Obadiah 1:20 can imply the taking of territories, while Ephesians 4:32 encourages kindness and forgiveness.
Ephesians 4:32: And be ye kind one to another, tenderhearted, forgiving one another, even as God for Christ's sake hath forgiven you.
Contradiction with Isaiah 2:4
Obadiah 1:20 suggests territorial possession involving conflict; Isaiah 2:4 envisions a time when nations will not learn war anymore.
Isaiah 2:4: And he shall judge among the nations, and shall rebuke many people: and they shall beat their swords into plowshares, and their spears into pruninghooks: nation shall not lift up sword against nation, neither shall they learn war any more. [pruninghooks: or, scythes]