Contradiction with Matthew 5:44
Psalms 54:3 speaks about strangers rising against the psalmist, while Matthew 5:44 instructs to love your enemies and bless those who curse you.
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 12:20
Instead of lamenting about enemies, Romans 12:20 suggests feeding and giving drink to them, which opposes the response in Psalms 54:3.
Romans 12:20: Therefore if thine enemy hunger, feed him; if he thirst, give him drink: for in so doing thou shalt heap coals of fire on his head.
Contradiction with Proverbs 24:17
Proverbs advises not to rejoice when your enemy falls, contrasting the tone of enmity in Psalms 54:3.
Proverbs 24:17: Rejoice not when thine enemy falleth, and let not thine heart be glad when he stumbleth: