No one really wants to look at the simple fact that in order for humans to survive, something else has to die. Whether that be an animal, a fish, a bird, a piece of fruit or a plant...
If we want to live, something else has to perish.
But then again, it's pretty much that way for all species. Even plants have to consume microbes through their root system.
It's called the Circle of Life. Be a part of it, without the guilt being thrust upon you...
It's not psychopathic to eat... :)