As for the hostility of others, I sometimes wonder if it is because they know they need to change their diet but don't want to, so they become resentful of those of us who do.
I agree with your thoughts entirely, CQ.
In my experience, this is true of many things besides the G F diet, too.
People often scoff at those who go against the norm or those who change things in their lives to make them better.
And people often ridicule things they do not really understand
Debbie downers exist everywhere.
Deep down, they wish they had the stones to affect such changes too.