Contradiction with Isaiah 2:4
Jeremiah 6:23 describes a people set for war, while Isaiah 2:4 speaks of a time when nations shall not lift up sword against nation, nor learn war anymore.
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 Micah 4:3
Jeremiah 6:23 portrays warriors, but Micah 4:3 envisions a future where weapons are turned into farming tools and war is no longer pursued.
Micah 4:3: And he shall judge among many people, and rebuke strong nations afar off; and they shall beat their swords into plowshares, and their spears into pruninghooks: nation shall not lift up a sword against nation, neither shall they learn war any more. [pruninghooks: or, scythes]
Contradiction with Matthew 5:9
Jeremiah 6:23 discusses a warrior people, contrasting with Matthew 5:9’s blessing of peacemakers.
Matthew 5:9: Blessed [are] the peacemakers: for they shall be called the children of God.
Contradiction with Romans 12:18
Jeremiah 6:23 talks about those set for battle, while Romans 12:18 encourages living peaceably with everyone.
Romans 12:18: If it be possible, as much as lieth in you, live peaceably with all men.
Contradiction with 1 Thessalonians 5:15
Jeremiah 6:23 involves war, opposing the message in 1 Thessalonians 5:15 to seek peace and not retaliate.
1 Thessalonians 5:15: See that none render evil for evil unto any [man]; but ever follow that which is good, both among yourselves, and to all [men].