I agree that the implications of the article are surely misleading. I can hardly think that sugar is benign. However, the graph itself might be informative in the sense that consumption has probably largely shifted to processed foods that often have trans-fats and possibly other additives. Excessive consumption of meat may also be not particular helpful in a diet. The authors should have investigated why a little more assiduously.
At any rate an editor should resist using a public journal as a private platform to promulgate his/her own particular slant on things without the full agreement of the editorial board.