Contradiction with Proverbs 10:12
Proverbs 10:12 speaks of love covering all sins, which contradicts the animosity and revenge planning in 2 Samuel 13:23.
Proverbs 10:12: Hatred stirreth up strifes: but love covereth all sins.
Contradiction with Matthew 5:44
Matthew 5:44 instructs to love enemies and bless those who curse, opposing the vengeful actions in 2 Samuel 13:23.
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 advises against taking personal vengeance, which contradicts the retribution planned in 2 Samuel 13:23.
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.