The evidence you cite for low-obese BMI's being healthier than normal BMI's is a blogger's critique of published research which had the opposite finding. Incide

The evidence you cite for low-obese BMI's being healthier than normal BMI's is a blogger's critique of published research which had the opposite finding. Incidentally, the first commenter on the blog did a pretty thorough job of refuting the blogger and defending the original study (whose findings contradict the claim you made here)