The practice of gratitude is a wonderful means of cultivating positive emotion. By beginning to practice feeling gratitude for what you currently have in your life, you free up a tremendous amount of energy that is normally dissipated in worry, anxiety, and fear. A positive feeling state, with an inspired heart and a clear mind, is the perfect starting place for moving toward creating a higher level of well-being in your life.
It would be far more constructive if people tried to understand their supposed enemies. Learning to forgive is much more useful than merely picking up a "stone" and throwing it at the object of one's anger, the more so when the provocation is extreme. For it is under the greatest adversity that there exists the greatest potential for doing good, both for oneself and others.