Not so sure I agree with your hypothesis that gluten prevents obesity...I'd say it's a fact that Americans are fatter than ever.
I've seen many a morbidly-obese welfare-hog, with equally fat-pig children in tow, piloting a supersized shopping cart (or two) piled to overflowing with boxes and bags of carbohydrate/sugar laden junkfood, and not a single healthy food item in the mix.
The proof's in the puddin'.
....deaths suffered by minorities in a large part because they tend to be more dependent on government hand-outs as a percentage of the population—cuz of past institutional racism of course/s.
So now the white devil slave master taxpayer racist is financing the obesity related deaths of minorities...
...can't win for losing.