Contradiction with Matthew 5:9
1 Chronicles 12:3 speaks of warriors and battle, while Matthew 5:9 emphasizes peace and being peacemakers.
Matthew 5:9: Blessed [are] the peacemakers: for they shall be called the children of God.
Contradiction with Isaiah 2:4
1 Chronicles 12:3 lists warriors prepared for conflict, whereas Isaiah 2:4 prophesies a time when people will transform weapons into tools for peace.
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 John 18:36
In 1 Chronicles 12:3, individuals are prepared for earthly battles; however, in John 18:36, Jesus speaks of a kingdom that is not defended by physical warfare.
John 18:36: Jesus answered, My kingdom is not of this world: if my kingdom were of this world, then would my servants fight, that I should not be delivered to the Jews: but now is my kingdom not from hence.
Contradiction with Romans 12:19
The warriors in 1 Chronicles 12:3 prepare for battle and vengeance, yet Romans 12:19 advises believers to leave vengeance to God.
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 Matthew 26:52
Where 1 Chronicles 12:3 highlights armed warriors, Matthew 26:52 warns that all who take the sword shall perish by it.
Matthew 26:52: Thinkest thou that I cannot now pray to my Father, and he shall presently give me more than twelve legions of angels?