Just my oppion but you look at traditonal diets of native populations over european. The native populations ate what was avalible and theor bodies may not process premade food as well. Native americans also have a higher risk.

stay away from prosessed food...meat and 2 veg

I think it is intresting, today i can search on my familytree overan petiod over about 400 or 500 years . Newspapers over the last 400 years. In these papers i can also look after my old family here in Holland
Macedonie, germany. Yeslooking after my famlytree i can see the diabetics is present even other diseases.

I have no idea sorry my friend, but it does make you wonder when you are always asked,... does it run in your family?