Is Peace in Every Human Relationship Possible?

I was recently watching a TV show and saw a character, a grown man, who was talking about his list of "mortal enemies." The comical part was the reasons the man had that led them to get on his list. One "enemy" was a TV character he idolized who failed to make a scheduled appearance the man had attended as a child. Another was "on the list" for opening the package of a collectible toy that apparently was valuable. The reasons this guy had "enemies" was not because they committed some atrocious act against him; in many cases the reason had practically nothing to do with things the "enemy" had done but was instead about his reaction and his pettiness.