People are crazed murders and psychopaths. It is natural for us to do atrocious things to others over differences we may have. Some do it for fun. Some don't like the other's way of life, culture, religion, ethnicity, etc.... Why feel upset over what humans naturally do? The majority of people are mean-spirited and would screw over the next person if it would benefit them in some way. Personally, I don't give a fuck anymore over what happens to anybody, so long as it isn't me or anyone close to me. I've seen too much suffering(through my deployments and occupation) that is has numbed me.