McCarthy was certainly right on the mark regarding slaughterhouse violence. If one stops to think for even a moment about the damage inflicted on our planet's animals for no reason greater than the selfish satisfaction of our palates, it becomes easy to understand why there will never be real peace in the world. If we can so easily sanction the cruel methods of breeding, raising and slaughtering animals, and then create a vastly profitable industry around that misery, then clearly we can justify the destruction of other human beings for causes which we actually deem important or essential.
The animal-rights people have a slogan which bears some reflection: "Nonviolence begins at breakfast." We have satisfied our taste buds at the expense of our conscience and I would say it is a poor trade indeed.