Their culture values violence, and toughness, and revenge, and paranoia. The Kosovars had grievances before, and they have even bigger ones now. I don't know how, or when, or whether, they will ever be able to forgive. It's hard to know all of what went into the making of the Littleton killing. But what happened there had some pretty deep roots.
Violence feeds on violence.
All this stuff has happened before. And it may very well happen again. I realize that we may not want to hear this. But the violence and the open wounds of injustice and hatred are not new. Yugoslavia and Kosovo.