“Dearly beloved, avenge not yourselves, but rather give place unto wrath: for it is written, ‘Vengeance is Mine; I will repay,’ saith the Lord.
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. Be not overcome of evil, but overcome evil with good.” Romans 12:19-21 (KJB)
Overcoming of evil is not expected of evil. It is expected of those who have been overcome by the One who has conquered the evil one who is Satan. He was defeated by Jesus Christ on the cross.
Our battle is not against flesh and blood. It is not against our neighbor across the street or across the creek, or on the other side of the fence. Our battle is against spiritual wickedness in high places (Ephesians 6:12). We are to love one another as believers in Christ.
We are to also show love to those who would mean us harm. Give them food and water. Give them wood for their fire. Overcome evil with good.
If you think this is difficult then just think of what Jesus Christ did for us. The sinless, guiltless, Son of God went to the cross to die for the sin laden, guilty, dirty, filthy, stinking sins of the sinners that you and me are. He really was overcoming evil with good.
Vengeance is God’s. Leave it with Him. Also see Deuteronomy 32:35 and Hebrews 10:30.