I don't think animal fat is bad; but equally I've never thought of a granola bar as a good food. (It's all sugar!)
I doubt anybody will ever convince me that eating a very pure, whole foods vegetarian diet (like in the China Study) is less healthy than following Atkins/paleo/similar. I imagine success depends more on adherence than anything else; and I'll stand by my point that Atkins-type diets are easier to follow in the West.

I remember when "Atkins" was a big thing sometime in the last decade, I despised everybody who was doing it. That was probably because I was working in a restaurant and we got all the "low-carbers" in. They were mostly idiots who didn't seem to understand that substituting a bowl of pasta for an omelette (not on our menu!) with two slices of toast was not "following a low carb diet", it was just "bothering the chef".