1. You used past tense, as did I, eating meat is still necessary for many around the world.
2. They don’t, because they’re below us in the food chain. Just as a gazelle doesn’t choose whether or not a lion wants to eat it.
3. Several of my friends are vegetarian and vegan and I think most take at least something supplement wise, what does that tell you?
4. I really don’t get this point still. You’ve admitted you treat humans differently to animals yourself by the baby-in-the-gorilla-cage point, we know black people are the same as white people, it’s only ignorants that don’t think like that, both past and present. It’s a weird point to make when talking about eating meat.
Anyway, what’s your goal here? The majority eat meat and will continue to, why can’t we just let people choose and get on with it?