OOps. Post 41 on this thread. Sorry.
Thank you. I agree with you, especially with your final sentence I quoted above. Some groups and some people can handle the excess carb load better than others; but, on the whole, humans evolved eating meat and fat. Agriculture, with the resultant consumption of grains, arose very late in human history.
The chronic diseases of today: heart disease, diabetes, obesity, cancer et al, were not always prolific, but relatively rare. What has changed is our diet -- not our genome.