my brother?...my enemy?

I’ve been reading some of Thomas Merton
Here’s an excerpt from No Man is an Island

Compassion teaches me that my brother and I are one. That if I love my brother, then my love benefits my own life as well, and if I hate my brother and seek to destroy him, I seek to destroy myself also. The desire to attack another with an ingot of red hot iron: I have to pick up the incandescent metal and burn my own hand while burning the other. Hate itself is the seed of death in my own heart, while it seeks the death of the other. Love is the seed of life in my own heart when it seeks the good of the other…
Violence rests on the assumption that the enemy and I are entirely different: the enemy is evil and I am good. The enemy must be destroyed but I must be saved. But love sees things differently. It sees that even the enemy sufferes from the same sorrows and limitations that I do. That we both have the same harmless human life. And that death is the same for both of us. Then love may perhaps show me that my brother is not really my enemy and that war is both his enemy and mine. War is our enemy. Then peace becomes possible.