Diabetes 2 and Hypertension are dietary problems...cut the fat, especially animal fat, cut out salt, sugar and processed foods and these “diseases” will disappear. No need to starve yourself.
The Atkins diet is low carb and high fat (not high protein). Some people get 85% of their calories from fat and successfully lose weight and show healthy lipid profiles.
The least healthful fats are PUFAs and PHFAs, the fats that the government has been pushing for 30 years.
Fats That Heal, Fats That Kill by Udo Erasmus
And there are several other books that reinforce the body chemistry reactions to the different fats in this one.