Contradiction with Exodus 20:13
2 Chronicles 17:16 speaks of willingly fighting against enemies, while Exodus advises against killing.
Exodus 20:13: Thou shalt not kill.
Contradiction with Matthew 5:9
Emphasizes being peacemakers, which contrasts with willingly engaging in battle.
Matthew 5:9: Blessed [are] the peacemakers: for they shall be called the children of God.
Contradiction with Romans 12:19
Advises against taking vengeance, conflicting with the concept of leading a volunteer army.
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
Envisions a future of peace without warfare, opposing the idea of going to war.
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]
Contradiction with James 3:17-18
Highlights peace and gentleness, contradicting the notion of willingly preparing for battle.
James 3:17-18: 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]