Contradiction with Matthew 5:44
Judges 20:24 describes conflict and warfare, but Matthew 5:44 advocates for love and prayer for one's enemies, promoting peace over violence.
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
Judges 20:24 involves human vengeance, whereas Romans 12:19 instructs believers to refrain from avenging themselves, leaving 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 14:14
Judges 20:24 involves preparation for battle, while Exodus 14:14 assures that God will fight for His people, implying that they need not resort to fighting.
Exodus 14:14: The LORD shall fight for you, and ye shall hold your peace.
Contradiction with Proverbs 20:22
Judges 20:24 depicts an act of fighting, contrasting with Proverbs 20:22, which advises against repaying evil with evil and encourages waiting for the Lord's salvation.
Proverbs 20:22: Say not thou, I will recompense evil; [but] wait on the LORD, and he shall save thee.
Contradiction with Isaiah 2:4
Judges 20:24 continues the cycle of war, while Isaiah 2:4 envisions a future where nations no longer wage war and instead turn weapons into tools for peace.
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]