Contradiction with 1 Samuel 15:18
This verse speaks of God instructing Saul to utterly destroy the Amalekites, contradictory to 2 Samuel 2:28 where Joab ceases pursuit and spares lives.
1 Samuel 15:18: And the LORD sent thee on a journey, and said, Go and utterly destroy the sinners the Amalekites, and fight against them until they be consumed. [they...: Heb. they consume them]
Contradiction with Proverbs 20:22
Encourages not to say "I will recompense evil," contradicting 2 Samuel 2:28 where Joab only ceases pursuit after significant violence.
Proverbs 20:22: Say not thou, I will recompense evil; [but] wait on the LORD, and he shall save thee.
Contradiction with Matthew 5:39
Teaches to not resist evil and to turn the other cheek, in contrast to the pursuit of enemies in 2 Samuel 2:28.
Matthew 5:39: But I say unto you, That ye resist not evil: but whosoever shall smite thee on thy right cheek, turn to him the other also.
Contradiction with Romans 12:19
Advises against taking revenge, whereas 2 Samuel 2:28 involves pursuit and conflict before stopping.
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.