Contradiction with Proverbs 16:7
This verse implies peace with enemies when one's ways please the Lord, contradicting the raising of adversaries described in Isaiah 9:11.
Proverbs 16:7: When a man's ways please the LORD, he maketh even his enemies to be at peace with him.
Contradiction with Matthew 5:9
This verse promotes peacemakers as blessed, opposing the theme of adversaries being stirred up in Isaiah 9:11.
Matthew 5:9: Blessed [are] the peacemakers: for they shall be called the children of God.
Contradiction with Romans 12:18
Encourages living peaceably with all men, which contrasts with the context of adversarial actions mentioned in Isaiah 9:11.
Romans 12:18: If it be possible, as much as lieth in you, live peaceably with all men.
Contradiction with 1 Peter 3:9
Advises not to return evil for evil, conflicting with the idea of adversaries being raised as in Isaiah 9:11.
1 Peter 3:9: Not rendering evil for evil, or railing for railing: but contrariwise blessing; knowing that ye are thereunto called, that ye should inherit a blessing.
Contradiction with James 3:18
Speaks of peacemaking through righteousness, opposing the conflict seen in Isaiah 9:11.
James 3:18: And the fruit of righteousness is sown in peace of them that make peace.