Contradiction with 1 Samuel 15:3
God commands the destruction of the Amalekites, contradicting acts of kindness mentioned in 2 Samuel 2:6.
1 Samuel 15:3: Now go and smite Amalek, and utterly destroy all that they have, and spare them not; but slay both man and woman, infant and suckling, ox and sheep, camel and ass.
Contradiction with Matthew 5:44
Jesus commands to love enemies, contrasting with the reward for past kindness mentioned in 2 Samuel 2:6.
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 Exodus 21:24
Advocates "eye for eye," which opposes the kindness and blessing context in 2 Samuel 2:6.
Exodus 21:24: Eye for eye, tooth for tooth, hand for hand, foot for foot,
Contradiction with Deuteronomy 7:2
Commands not to show mercy to certain nations, conflicting with the concept of kindness in 2 Samuel 2:6.
Deuteronomy 7:2: And when the LORD thy God shall deliver them before thee; thou shalt smite them, [and] utterly destroy them; thou shalt make no covenant with them, nor shew mercy unto them:
Contradiction with Proverbs 25:21
Advises giving food to enemies, which contrasts with the specific kindness rewarded to friends in 2 Samuel 2:6.
Proverbs 25:21: If thine enemy be hungry, give him bread to eat; and if he be thirsty, give him water to drink:
Contradiction with Luke 14:26
Speaks of hating family for discipleship, opposing the familial loyalty expressed in 2 Samuel 2:6.
Luke 14:26: If any [man] come to me, and hate not his father, and mother, and wife, and children, and brethren, and sisters, yea, and his own life also, he cannot be my disciple.