Shall I puff out my chest and say meat-eating is natural and noble? Shall I make fun of vegetarians, call them unrealistic, or try to poke holes in their position?
No. If a meat eater is honest with themselves, if we give it an iota of thought, we must admit that vegetarianism is a morally superior position. Simple as that. It's a no-brainer. One diet is based on killing animals, sentient creatures that suffer. The other diet is based on not killing animals. How much simpler can it be?
If anyone chooses vegetarianism for moral reasons - as my wife and my ex-girlfriend did - it's a beautiful thing. These people have the moral imagination and empathy to feel for animals, an advanced empathy, an enlarged amygdala perhaps. And that deserves praise from all of us. Moral vegetarianism comes in two flavors: (1) it's wrong to kill animals and/or (2) it's wrong to subject animals to suffering, an indictment of the meat industry. I have genuine respect for both positions. If my son Immanuel becomes a vegetarian, I would be glad for him. Other vegetarians may choose for different reasons: they don't like meat, or the culture, or they want to be healthier and could care less about animals. That's okay too, but I do think the moral position deserves the most praise.
Let's not get carried away. Vegetarians should not judge - they should understand us and accept us as falling short of an ideal; after all, don't we all fall short of ideals? Judge not. As always, the best way to promote the cause is to simply be (lead by example; be the change you want to see in the world). The vegetarians I have known have been great examples for me. As for meat eaters judging vegetarians, now that's laughable! - but sadly happens all the time.
Meat eaters want to argue that it's natural. Yes, eating meat is "natural", normal, and prevalent, but that's not a good moral argument. (check out my blog on that). Explaining a behavior does not justify it, although it helps to put it in context. Human beings, looked at as an animal species alone, are indeed omnivores. Historically, we have always ate meat (when and if we could catch it), although I understand that a very small percentage of our diet was in fact meat (because it's hard to catch), and now we eat too much (from a health perspective). Free will, morality, and modern-day realities and luxury allow us to choose vegetarianism if we want. For most Americans, it's an open choice. One is better. I choose the worse one.
The fact that I hunt for my meat doesn't help my position very much. Everyone who eats meat must be comfortable with the fact that they are killing animals. They are complicit. I simply do it. I enjoy the total experience of hunting, but I do not enjoy killing a deer. I kill deer for the meat, which I take care of properly (well, as "proper" as I can). Some vegetarians - the ones who don't like the meat industry - think it's better that I kill my own meat and process it in a more humane way.
Morality makes demands on us. Some behaviors are required, others condemned, and others are merely permissible or allowed. Much like drinking beer in moderation is morally permissible, eating meat in moderation is morally permissible in my opinion. It's allowable. But such a lifestyle is certainly not on the same level as a vegetarian lifestyle. There is a better way, and I imagine that 100 years from now most people will have a plant-based diet. That's how morality works sometimes.