Contradiction with Exodus 20:13
Judges 21:13 facilitates a resolution involving war with another tribe, which may include killing, whereas Exodus 20:13 states, "Thou shalt not kill."
Exodus 20:13: Thou shalt not kill.
Contradiction with Matthew 5:44
Judges 21:13 involves confronting tribes in conflict, while Matthew 5:44 advises to "love your 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
Judges 21:13's actions involve taking revenge, clashing with Romans 12:19 which states, "avenge not yourselves...vengeance is mine; I will repay, saith the Lord."
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 James 3:18
Judges 21:13 deals with conflict resolution through confrontation, while James 3:18 promotes peace, "the fruit of righteousness is sown in peace of them that make peace."
James 3:18: And the fruit of righteousness is sown in peace of them that make peace.