I suspect the whole problem people have with fat people tends to have nothing to do with concern for their health. Not normally anyway. Most people dislike fatness simply because it looks ugly. After all, most people can get round smokers destroying their own health (just so long as they don't stink up the place), so what is the big difference? Oh, that is right - a fat person looks unpleasant. And people are more concerned with not having to look at something unappealing then they are about the whole health issue. The health issue is just a rationalisation.