Contradiction with Matthew 5:44
This verse advises to love your enemies and pray for those who persecute you, which contrasts with the idea of justice and destruction for evildoers found in Proverbs 21:15.
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
This verse instructs believers not to seek vengeance but leave it to God's wrath, which contradicts the concept of finding joy in executing justice as mentioned in Proverbs 21:15.
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 James 1:20
This verse states that human anger does not produce the righteousness that God desires, opposite to Proverbs 21:15 which suggests justice for the righteous and terror for evildoers.
James 1:20: For the wrath of man worketh not the righteousness of God.