Contradiction with Isaiah 2:4
Contradicts by promoting peace and the end of war, while Psalms 136:20 celebrates victory in battle.
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 5:9
Emphasizes being a peacemaker, contrary to the theme of conquest in Psalms 136:20.
Matthew 5:9: Blessed [are] the peacemakers: for they shall be called the children of God.
Contradiction with Matthew 5:44
Encourages loving enemies, whereas Psalms 136:20 focuses on defeating them.
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
Advises against seeking personal vengeance, opposing the triumphant tone of vanquishing enemies in Psalms 136:20.
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 3:17
Describes wisdom as peaceable and gentle, contrasting the warrior victory depicted in Psalms 136:20.
James 3:17: 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]