If the situation was such that there was only one learned lama or genuine practitioner alive, a person whose death would cause the whole of Tibet to lose all hope of keeping its Buddhist way of life, then it is conceivable that in order to protect that one person it might be justified for one or 10 enemies to be eliminated if there was no other way.
If indeed the qualities such as love, patience, tolerance, and forgiveness are what happiness consists in, and if it is also true that compassion, defined as concern for others, is both the source and the fruit of these qualities, then the more we are compassionate, the more we provide for our own happiness.
I believe all suffering is caused by ignorance. People inflict pain on others in the selfish pursuit of their happiness or satisfaction. Yet true happiness comes from a sense of inner peace and contentment, which in turn must be achieved through the cultivation of altruism, of love and compassion and elimination of ignorance, selfishness and greed.
At a personal level, as a Buddhist practitioner, I deliberately visualize and think about death in my daily practice. Death is not separated from our lives. Due to my research and thoughts about death, I have some guarantee and some conviction that it will be a positive experience.
Let us have that kind of effort from all, except those child or handicapped or too old. But the many people, they sort of have the opportunity to create trouble or to create a good thing, now should think more seriously, should not indulge any work to create more problems.
The practice of altruism is the authentic way to live as a human being, and it is not just for religious people. As human beings, our purpose is to live meaningful lives, to develop a warm heart. There is meaning in being everyone's friend. The real source of peace amongst our families, friends and neighbours is love and compassion.