Just one thought, you are saying that since they became more vegetarian there health has become worse. Yes those bad foods are vegetarian, but that doesn't mean the reason they are bad is because they are vegetarian foods. If a potato was laced with cyanide, you wouldn't say the potato is the problem, you would say the cyanide was. Same with pizza. It's not the vegetarian part that is wrong with it, it's the other stuff (i don't know what the other stuff is, fats and salts I guess)
Also how is rice a killer? I thought it was super healthy, I eat it often.