Contradiction with Matthew 5:44
Isaiah 34:8 speaks of vengeance and recompense, while Matthew 5:44 calls for love and blessing towards enemies.
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
Isaiah 34:8 emphasizes divine vengeance, whereas Romans 12:19 instructs believers to abstain from taking vengeance themselves.
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 Proverbs 25:21-22
Isaiah 34:8 focuses on retribution, while Proverbs 25:21-22 encourages feeding and giving drink to enemies, suggesting kindness instead of vengeance.
Proverbs 25:21-22: If thine enemy be hungry, give him bread to eat; and if he be thirsty, give him water to drink:
Contradiction with James 1:20
Isaiah 34:8 involves divine wrath, but James 1:20 says that the wrath of man does not produce the righteousness of God.
James 1:20: For the wrath of man worketh not the righteousness of God.
Contradiction with Luke 6:27-29
Isaiah 34:8 pertains to vengeance, whereas Luke 6:27-29 teaches to do good to those who hate you and turn the other cheek instead of seeking retribution.
Luke 6:27-29: But I say unto you which hear, Love your enemies, do good to them which hate you,
Paradox #1
This verse talks about a time of punishment and retribution. The contradiction or conflict might be seen in the idea of a loving and forgiving deity engaging in severe punishment. Some might find it inconsistent with messages of mercy and forgiveness found elsewhere in religious teachings.