I agree with you on that point. as far as facts, i got the impression you're asking for facts about ethics. The question here would be, am I correct in saying that your conscience does bother you about eating meat - and so does every one elses'. As far as lions go, they learn from their parents to eat meat, it's not a pre-programmed reaction to hunger. You can also try contacting Tana Helfer, the daughter of the woman Toni Helfer who wrote the book The Gentle Jungle. Toni experimented with lions on a vegetarian diet and says they were all healthy.
Animals kill, humans kill, that's a fact.
Your belief that it's not wrong and my belief that it is wrong are opinions. For your information, and this is a fact, I used to have an opinion similar to yours. I just feel like those people are the same as any racist or sexist. You veggies have to learn that if you want to get along with the rest of the free world. No, that's the food chain.