Contradiction with Proverbs 20:22
This verse advises against seeking personal vengeance, while Joshua 8:11 involves a military strategy against Ai, which includes taking action against an enemy.
Proverbs 20:22: Say not thou, I will recompense evil; [but] wait on the LORD, and he shall save thee.
Contradiction with Matthew 5:44
This verse teaches to love and pray for enemies, which contradicts the approach of preparing for battle in Joshua 8:11.
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
It emphasizes leaving vengeance to God, conflicting with the active preparation for an attack in Joshua 8:11.
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.