Contradiction with Proverbs 16:7
This verse claims that when a person's ways please the Lord, He makes even their enemies be at peace with them, which contradicts the notion of warfare in 2 Samuel 12:29.
Proverbs 16:7: When a man's ways please the LORD, he maketh even his enemies to be at peace with him.
Contradiction with Matthew 5:9
This verse from the Beatitudes states that peacemakers are blessed and called the children of God, contrasting the act of fighting and capturing cities in 2 Samuel 12:29.
Matthew 5:9: Blessed [are] the peacemakers: for they shall be called the children of God.
Contradiction with Romans 12:19
This verse advises believers not to seek vengeance, but rather allow God to avenge, in contrast to the military action and personal retribution seen in 2 Samuel 12:29.
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 Isaiah 2:4
This prophetic verse envisions a time when nations will no longer engage in war, directly opposing the warfare described in 2 Samuel 12:29.
Isaiah 2:4: And he shall judge among the nations, and shall rebuke many people: and they shall beat their swords into plowshares, and their spears into pruninghooks: nation shall not lift up sword against nation, neither shall they learn war any more. [pruninghooks: or, scythes]