I don't believe the "violence" to which he referred is really what most of us think of when we hear the word, but simply all the minor conflicts, anxieties and problems that each of us encounters every day as part of a normal life. I believe you have to keep in mind that Krishnamurti came from a religious tradition that considers even the separation between two individual human beings to be an illusion - one to be overcome. There is nothing that is any more intrinsically "violent" about recognizing one's ancestry, nationality, gender, etc., than there is in acknowledging that you and I are separate people; it's just what people sometimes do with that information that causes problems. The barriers and conflicts created by pridefulness and tribalism are not inevitable.