Well actually

murder is a very natural thing for man to do as is violence and rape.

Out in the forest Chimpanzees will murder each other and the males will gang rape the females.. Now man is just a jump above chimps so it is entirely normal for man to murder and rape even in gangs. Man has come up with this concept of social morality believing that it will ensure societal balance... But who really knows? Would society achieve a more natural balance if constructed social "morality" was not in place?

The universe has been around for over 15 billion years and will be around for perhaps another 15 billion. We will be alive for an imeasurably small amount of time on that timeline. Less then the width of a hair. So what that means is that we will be dead for most of the existence of the universe. So it would reason that society and morality mean nothing in the big picture..

There is no right and wrong in this unicerse. Only actions and non actions. Love is just a neurologically mediated evolutionarily developed survival strategy that feels good. It does not make it good however...

As a wise teacher once said to me when I was taking some lessons with the Hip Sing in Chinatown. "If it is not about fighting for a woman I don't want to hear about it"...

So the only valid forms of agression are

1. To get sex...
2. To maintain what gives you the sex..
3. Territorial maintainance (Includes food, family unit)

Everything else is a bunch of nonsense...