Loving your enemy is a Grace so it’s not something we can learn. But there are exercises I do that I find helpful and when Christ sees the effort we put into trying He will often bestow upon us the Grace if He wants.
I take a picture of someone in my mind who find really mean and horrible. I picture this person and I try to view them as Christ would do so. How does Christ see this person in comparison to me? Is his love any different for me than it is for him?
It could be someone close to you who committed a red scarlet sin. It could be a member of Isis you saw behead or kill someone. Whatever and whoever it may be, it helps to picture that person when they were an innocent baby themselves before they became who they did.
When I do this and ask these questions, I suddenly feel love for them. If at any time I do this and I don’t feel love for them and the hatred is strong, it is because my prayer life is weak and relationship with God needs more attention.
Everything has its root in our relationship with God. How we approach certain situations will all determine on our relationship or lack thereof with Jesus.
Try it, I find that it works and well as praying for them. How do you go about forgiving your enemies?