My point is "If God didn't want us to eat animals, why did he make them out of meat?" is humorous, but not much of an argument against vegetarianism. Nobody eats humans, few eat monkeys, few eat horses, few ( in the West) eat dogs, yet those are all made of meat.
Everyone draws the line on how highly evolved a creature he will eat. Some draw it at pigs, some at carrots. Just defending the vegetarians who are not leftist idiots.
Morality in eating has nothing to do with the evolved state of an animal. That is just the wrong spectrum of argument to chose. Morality in eating has to do with fighting with the right to privilege as opposed to be privileged. A vegetarian that pigs out on carrots is an immoral pig, end of story.