The vegetarians get hammered down without proper defence. True. But why? Here's the reason... The number of people living on a vegetarian diet are as few as minimum. And all the vegetarians know that it's wrong to kill animals for eating.(morally, ethically, environmentally, whatever). What we can say in defence is that you should try vegetarian diet once and you'll feel the difference yourself. What more can we say? If we say, you're going to feel better, you'll be prone to less diseases or you'll have peace and calm behaviour. Is anybody going to listen?
And I think the things mentioned here regarding the food chain. Well, LOL!