Studies that look at people and their habits have linked vegetarian diets with a decreased risk of heart disease, diabetes, high blood pressure, obesity, and colon cancer.]

Not entirely true; individual/familial predisposition to cancer, hypertension etc., is a major trigger, not solely what is consumed. Randomised studies often do not have control references in them unless over a very large population sample, and often biased with ethnicity factors. Besides which, all things in moderation.