Contradiction with Matthew 5:44
Contradicts by instructing to love enemies, while Judges 11:14 features Jephthah preparing for conflict with the Ammonites.
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 12:18
Advises to live peaceably with all men, contrasting the impending war context in Judges 11:14.
Romans 12:18: If it be possible, as much as lieth in you, live peaceably with all men.
Contradiction with Proverbs 15:1
Stresses a soft answer turning away wrath, differing from the messages exchanged in Judges 11:14.
Proverbs 15:1: A soft answer turneth away wrath: but grievous words stir up anger.
Contradiction with James 3:17
Describes wisdom as peaceable and gentle, unlike the contentious circumstances in Judges 11:14.
James 3:17: But the wisdom that is from above is first pure, then peaceable, gentle, [and] easy to be intreated, full of mercy and good fruits, without partiality, and without hypocrisy. [partiality: or, wrangling]