Its my country by choice, my family left Norway and the Netherlands after WWII to Australia and I left Australia for the US...but its a bit rich to say i'm offensive when you generalized an entire nation, sure there are weight issues globally with an over abundance of high yield foods, WAY too much electronic stimulus and not enough incentive to get outside but these over weight people have enough issues without everyone insulting them. You are correct on the population estimate (will admit I haven't checked it in some years) but the actual % figures of Obesity in the US have been highly controversial in how they poll the population. Come to a US event where some talented armor smiths come out with very accurate gear, SCA does not represent this and there are smiths of weapons and armor that will rival any Euro smith.
SCA is a fun club for the weekend to get some aggression out with rattan swords...its never meant to be accurate and the armor is often inexpensive Pakistan import stuff. I do like your talent and what you make, but myself being considered overweight (despite no physical limits and a VERY outdoors lifestyle) by doctors and having great friends who happen to be overweight I'm hesitant to insult them based on physical appearance and how armor is apparently made here.
Please look up the amazing suits of armor for King Henry VIII of England who had a 52" girth...it supersedes the craftsmanship of many armor smiths today and he was by NO means slender.