An animal can kill without all this sympathy filling this thread. That is the way Earth has been for a few million years, why change it in the last few thousand?
And fine, religion is out of the conversation.
How often do you see one animal kill another of it's kind?
It's not as common as you make it seem. Animals kill other animals for the sake of survival, not sport.
We're not talking about animals killing. We're not talking about murder. We're talking about people dying, and you showing no sympathy for the family whatsoever.
Do you think that fallen soldiers should just be "burned for energy", too?