First, like yourself, one wishes more than words can say that what just took place in Newtown, Connecticut, never happened at all; and certainly we wish it were possible to comfort all of those who have suffered the terrible loss that they have. But now to the question at hand:
You have asked for some insight, some light by which you can dispel this growing darkness now reflected within you because of this reprehensible act of some evil human being. Within the following ideas is the truth that you need to not just see, but integrate (within you), if you wish to be free of what is tearing at your soul.
By your own account, you are "so angry you're ready to go out and fight with random people in the streets." And then, in the very next sentence, you describe a heinous act perpetrated by a horrible and inhumane monster -- basically wondering how it's possible this human being could be so degraded as to randomly destroy innocent lives. As difficult as it is for those who wish to be true aspirants of the higher life, we must see that this rage we feel, the violence that seizes our chest -- that seems so justified -- is the exact same dark state that drove this sleeping man to perpetrate the violence that he did on others. There is no right way, no right reason ever, to allow hatred to become our guide, our God, actually whenever we are deceived into doing its bidding.
That said, you are quite correct: "the power of love cannot be defeated." But it's not a question of reorienting oneself to the violence awakened within oneself by the violence of someone else. The task in such moments is to realize that no matter where it surfaces, no matter how much suffering it produces as a result, violence is violence wherever it appears. It is blind, dark, and dedicated to expressing itself, using whatever hapless human being it may appear temporarily within.
Your task, the true task of anyone who would share in the life of the divine, is to be aware of this flaming hatred, and to not be its instrument. Rather than lending it your life -- as it demands its expression -- to die to it in yourself by consciously suffering its presence without participating in its direction. The light of this awareness -- the goodness and the love that is its source -- then does what only it can do: transform both the darkness that has been brought into it, as well as the individual who agrees to this Transfiguration. For it means not only that some degree of that unconscious, raging force is made conscious of itself, but the individual within whom this has taken place is also integrated, liberated -- in the truest sense of the word -- from all that would denigrate and otherwise corrupt the soul.
