What is an enemy, but a perception of separation? Most certainly, you can understand the word if another has personally harmed you. But what of those you are merely informed are your so-called enemies? You march off and kill each other because the mass consciousness has accepted these labels. We are not telling you what to do or not to do. There are times when self-defense is an excellent option as a learning tool in a reality in which death appears real.
When you fully understand that death is an illusion—that only the body dies, and that the spirit pays for all actions ultimately, then all actions lead either to growth or to stunting growth. With this understanding, there are no enemies. All are fellow travelers and some are greater teachers than others. Love thy enemy—if such a thing exists—as yourself, and you will begin to understand that all is one.