Contradiction with Matthew 5:44
Joshua 10:34 describes conquest and destruction, whereas Matthew 5:44 calls for love and forgiveness of enemies.
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 Romans 12:19
The verse in Joshua presents a scenario of vengeance in battle, while Romans 12:19 advises against seeking personal vengeance.
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 Exodus 20:13
Joshua 10:34 involves warfare and killing, contrary to the commandment against killing in Exodus 20:13.
Exodus 20:13: Thou shalt not kill.
Contradiction with Isaiah 2:4
While Joshua 10:34 depicts warfare, Isaiah 2:4 speaks of a time when nations will not 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 Matthew 26:52
Joshua 10:34 involves the use of the sword in battle, but Matthew 26:52 warns that those who use the sword will 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?
Contradiction with Proverbs 25:21-22
Joshua 10:34 narrates the conquest of territories, whereas Proverbs encourages showing kindness to enemies.
Proverbs 25:21-22: If thine enemy be hungry, give him bread to eat; and if he be thirsty, give him water to drink:
Contradiction with Isaiah 11:6-9
Joshua 10:34 describes human conflict, whereas Isaiah 11:6-9 envisions a peaceful existence where harm and destruction do not occur.
Isaiah 11:6-9: The wolf also shall dwell with the lamb, and the leopard shall lie down with the kid; and the calf and the young lion and the fatling together; and a little child shall lead them.
Contradiction with John 18:36
The verse in Joshua is about earthly battles, while John 18:36 speaks of a kingdom not of this world that does not fight.
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 2 Corinthians 10:3-4
Joshua 10:34 focuses on physical warfare, but 2 Corinthians 10:3-4 speaks of spiritual warfare, not fought with physical weapons.
2 Corinthians 10:3-4: For though we walk in the flesh, we do not war after the flesh:
Contradiction with James 3:17-18
Joshua 10:34 is about conquest, but James 3:17-18 describes wisdom’s peaceful and gentle nature, producing peace.
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]