This blind defence of MacDonalds and their like always surprises me when we already know that the US food industry has knowingly created a massive health/obesity problem. We should not just shrug this off.
Britons are on average three stone heavier than we were fifty years ago. I watched a part of a documentary series last week called "The Men Who Made Us Fat". It was about the production of corn syrup/fructose and it was quite frightening.