I said I'd answer the posts a few pages ago in more detail, but it seems to me others have already made most of the points I would have, so I feel no need for it. If one of the vegans wants my answer to a particular point of theirs, please post it again; otherwise I'll try to move forward.
Anyway, the discussion has boiled down to both sides presenting some moral theories about whether animals have rights or not.
The vegan side (it seems to me; correct me if I'm wrong) believes animals have a capacity for suffering, desires and intentions, and that from this it follows that all moral rules that apply to humans apply to animals as well.
The omnivore side has made the claim that "capacity for suffering" is something produced by a form of abstract thinking unique to humans (some higher primates may or may not also be included), and that it is this abstract thinking, along with the fact that we are of a different species, that distinguishes humans from animals from a moral perspective.
The vegan side claims this distinction is "arbitrary", and also seem to say "arbitrary" equals "useless" which, in this case, equals "wrong", all of which are questionable claims when speaking of morality. Also,
why would drawing the line at abstract thinking be more arbitrary than drawing it at capacity for suffering?
Another point made by the vegan side is that some mentally retarded humans, fetuses and young children do not fulfill the criteria of abstract thinking.
For fetuses and children, it has been presented that they have the potential to develop abstract thinking.
This was also labeled "arbitrary". Some vegans have gone as far as to say they don't agree that having potential for something is grounds for moral consideration. (That's the impression I got, at least. If no one in fact believes this, disregard my next paragraph).
So, would you say that a human with no capacity for suffering, intentions or desires, but who has the potential to develop them, would it be okay to kill and eat them? (If there are some other qualities animals have that you believee grant them rights, rephrase the question to involve those).
As for the arbitrariness of the potential-argument.. Well, yes, it is arbitrary. So what? Why shouldn't a moral system make some arbitrary assumptions? Or rather, can you provide an example of a moral system that does not?
For the case about severely mentally retarded humans, namely that if moral rights are granted according to capacity for abstract thinking, then then some mentally retarded humans will have none - that is to say, the moral reasoning that allows me to eat meat doesn't protect these people.
Again, so what? It doesn't protect my windows or mow the lawn either. I have other reasons for not eating retarded people than their intelligence. The extreme example given, a human whose mind is so poorly developed he is indistinguishable from an animal, and has no potential for growth.. no, I do not believe this hypothetical being is in any way above animals. I don't think their life has any particular value. (It should be noted that I've never met or heard about a person like this, with the exception of the people born without brains).
The reason I would still not kill or hurt the person is the same as my reason for not hurting animals unnecessarily; such acts are very reminiscent to hurting people that can actually suffer. It would feel like hurting a person. Also, I can't think of a situation where hurting this retarded person was necessary; even the most fiery-souled vegan can't really think a meat-eater would consider eating human flesh any more readily than a vegan. Right?
It's been a long rant, so I'll sum it up here.
1) The meat-eater view is no more arbitrary than the vegan view.
2) No matter how many times you present it, the idea that meat-eaters should also eat children is false.
3) The arrogant, rude and condescending attitude that all vegans arguing in this thread seem to consistently sport is not helping your cause.