It's true what you wrote: We kill animals to feed ourselves (animal are living organisms), we cut plants to feed ourselves (plants are living organisms). So I think the problem you should focus on to convince people to be vegetarian (which I personally think is a very good idea) is to tell people what they gain from this type of alimentation. So you should focus on these matters that bother the average person like:
- HOW can I become more beautiful, smarter, stronger,
- What do I have to eat to smell better especially when I am with my partner,
- How could I improve my sexual performance, and why not
- How could I live up to 150 years etc.
A very important thing is that our modern food factories provide soya products such as milk, cheese (tou-fu), etc B U T how healthy are these products actually? Aren't they full of chemicals to make them edible? Aren't they another lie on the market.....?