Contradiction with James 1:20
James 1:20 states that the wrath of man does not work the righteousness of God, which contradicts Judges 21:15 where God's people show regret after acting in wrath against the tribe of Benjamin.
James 1:20: For the wrath of man worketh not the righteousness of God.
Contradiction with 1 John 4:8
1 John 4:8 emphasizes that God is love, contradicting the grief and regret shown in Judges 21:15 after the near annihilation of a tribe.
1 John 4:8: He that loveth not knoweth not God; for God is love.
Contradiction with Matthew 5:44
In Matthew 5:44, Jesus teaches to love enemies, which contrasts with the actions of the Israelites in Judges 21:15 leading to the need for repentance and grief.
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
Romans 12:19 says vengeance belongs to God, which contradicts the Israelites taking action themselves leading to regret in Judges 21:15.
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 Colossians 3:12
Colossians 3:12 calls for kindness and compassion, contrasting Judges 21:15 where the aftermath of previous lack of such qualities leads to sorrow.
Colossians 3:12: Put on therefore, as the elect of God, holy and beloved, bowels of mercies, kindness, humbleness of mind, meekness, longsuffering;
Paradox #1
The verse implies that the Israelites felt sorry for causing trouble to one of their own tribes, yet their solution involved actions that led to further violence and suffering. This shows a contradiction between feeling remorse and solving problems through actions that may not align with those feelings of regret.