I didn't say that it "justified" violence; it's just a natural consequence. It's just like the saying goes "If you want peace, you must work for justice." No justice, no peace. It's as simple as that. People who accept an unjust world because "that's the way it is" have absolutely no business complaining about any violence whatsoever.
However, I agree that humans are predisposed to violence and that our culture seems to include much glorification of violence and thuggish behavior. We even have war monuments, public holidays, and other such solemn occasions where we honor those who fight and kill around the globe, in order to "make the world safe for democracy" or something like that. But there are also plenty of TV shows, movies, books, music, video games, etc. which might depict and glorify violence.
Even as a kid, I remember we'd watch movies with explosions or shootings or other blood-and-guts type scenes where all us guys would go "Whoa, that's really cool, man!" I'd get that vibe when attending midnight showings of "Dawn of the Dead." Of course, it's all make believe. Nobody is actually dying, but we still like the visual display just the same.
That is somewhat of a puzzler, I'll admit, especially since those who look at it can act so tough and indifferent when it's on a movie screen, yet most would probably fall apart into tears if they had to deal with such things in real life.
