More than a third of East Asians have a deficiency in one of the enzymes involved in the breakdown of alcohol (aldehyde dehydrogenase). They cannot properly metabolize it.
Inuits have mutations in genes that code for enzymes that desaturate carbon-carbon bonds in fatty acids. This means they can handle diets that are very high in certain types of omega-3 and omega-6 fatty acids.
A mutation of the melanocortin-4-receptor (MC4R) leads to a markedly increased preference for high fat, but a significantly reduced preference for high sucrose food.
So what I'm saying is that blanket statements like "well if I/those guys can do it then everybody should be able to" have no real value. Diets are strongly influenced by and relying on genetics. Since we don't have the same genes we won't handle the same diet in the same way. Linking to statements that have since been withdrawn due to omissions also doesn't help.
Edit. Huh... getting downvoted for saying diet and genetics go hand in hand, with evidence that hasn't been retracted. If anybody was wondering why some people are never taken seriously, it's because they reject reality thinking this will change it.