Never intended?

Dr. William C. Roberts, M.D. writes

When we kill animals to eat them, they end up killing us because their flesh, which contains cholesterol and saturated fat, was never intended for human beings, who are natural herbivores.

"intended"!? I wonder where he found what this intention was. Maybe the intention is for us to kill animals, who then kill us. Or the intention was for him to write that, for me to read it, and then write this....