Contradiction with Matthew 5:44
While Psalms 55:12 speaks about betrayal by a peer, Matthew 5:44 instructs to love and forgive enemies, presenting a contrasting approach to dealing with adversaries.
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 Proverbs 25:21-22
This verse advises showing kindness to an enemy, differing from the distress expressed in Psalms 55:12 about being wronged by a friend.
Proverbs 25:21-22: If thine enemy be hungry, give him bread to eat; and if he be thirsty, give him water to drink:
Contradiction with Romans 12:20
Encourages feeding and caring for enemies, presenting a contradiction to the lamentation of betrayal in Psalms 55:12.
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 Luke 6:27
Advises loving enemies and doing good to those who hate, contrasting with the anguish of betrayal by an equal in Psalms 55:12.
Luke 6:27: But I say unto you which hear, Love your enemies, do good to them which hate you,
Contradiction with 1 Peter 3:9
Instructs not to repay evil with evil but with blessings, contradicting the grievance of betrayal found in Psalms 55:12.
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.