The study that article is based on (well, there are several layers of 'articles' between the SA article and the actual study) is particularly bad (in a field where bad research is pretty much the norm)...
High protein or high in red meat? There's a huge difference there. If I eat a high protein diet with my protein coming from e.g. soy, am I still under the same risk?
http://www.marksdailyapple.com/will-eating-red-meat-kill-you...