The root of discord and violence between people and nations comes from our tendency to forget our humanity. We "forget" our true nature.
Violence is a "learned" behavior. We "learn" it from our environment. When we are born, we do not possess the tendency to violence. As we grow, we become driven by "reactions." Our reactions are influenced by what we witness in our environment. We "copy" what we see. Therefore, violence and hatred are not natural to our essence.
As we grow older, we "buy" into the deception. We come to believe that violence is "OK" when "justified". It is "OK" to kill for our beliefs or defending our "territory." We have learned to "possess." We "live to possess". We like to possess things, people, land, animals, anything tangible and intangible. The more we possess, the more powerful over others we feel. Our society or community reinforces this