"Do not return evil for evil.” ( 1 Pet 3.9 , Rom 12.17 , 1 Thes 5.15 )
"Overcome evil with good.”( Rom 12.21 ) "Beloved, never avenge yourselves, but leave room for the wrath of God; for it is written, ‘Vengeance is mine, I will repay, says the Lord.’” (Rom 12.19 )
We are specifically called to follow Jesus example of suffering love and non-retaliation. ( 1 Peter 2.21). Jesus died for the life his enemies. ( Rom 5.8, 10 ) Jesus gave this as the specific reason to love our enemies, "so that you may be sons of your Father who is in heaven" ( Mat 5.45 ) -- to be like him!
God will take care of us and is fully capable of handling those who do evil. We should not fear people, even those who could kill us (Matt 10.28 ).
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Mt 5:44 But I say to you, Love your enemies and pray for those who persecute you, 45 so that you may be sons of your Father who is in heaven; for he makes his sun rise on the evil and on the good, and sends rain on the just and on the unjust.
Lu 6:27 But I say to you that listen, Love your enemies, do good to those who hate you, bless those who curse you, pray for those who abuse you. 29 If anyone strikes you on the cheek, offer the other also;
Lu 6:35 But love your enemies, do good, and lend, expecting nothing in return. Your reward will be great, and you will be children of the Most High; for he is kind to the ungrateful and the wicked.
Mt 5:39 But I say to you, Do not make use of force against an evil man; but to him who gives you a blow on the right side of your face let the left be turned. -Bible in Basic English
Lu 6:37 "Judge not, and you will not be judged; condemn not, and you will not be condemned; forgive, and you will be forgiven;
Lu 12:22 And he said to his disciples, "Therefore I tell you, do not be anxious about your life, what you shall eat, nor about your body, what you shall put on.
Mt 26:52 Then Jesus said to him, "Put your sword back into its place; for all who take the sword will perish by the sword.
Mt 7:12 In everything do to others as you would have them do to you; for this is the law and the prophets.
1 Peter 3.8 Finally, all of you, have unity of spirit, sympathy, love of the brethren, a tender heart and a humble mind. :9 Do not return evil for evil or reviling for reviling; but on the contrary bless, for to this you have been called, that you may obtain a blessing.
Ro 12.17-21 Do not repay anyone evil for evil, but take thought for what is noble in the sight of all. 18 If it is possible, so far as it depends on you, live peaceably with all. 19 Beloved, never avenge yourselves, but leave room for the wrath of God; for it is written, "Vengeance is mine, I will repay, says the Lord." 20 No, "if your enemies are hungry, feed them; if they are thirsty, give them something to drink; for by doing this you will heap burning coals on their heads."
21 Do not be overcome by evil, but overcome evil with good .
1Th 5:15 See that none of you repays evil for evil, but always seek to do good to one another and to all.