It's also in your nature to murder other humans, steal things, and participate in all sorts of mischief. If you're of a certain disposition it's in your nature to rape children, maybe hang cats, or try to destroy the lives of other people in other ways. I personally do not eat meat but I also don't shun those who do - my goal is only to do my best to reduce suffering as much as I can - but I think that to argue that it's in your nature to do something is a very poor argument. Being human means we can largely overcome our nature, or at least make rational choices about it.