I think it's harsh. to say that Type 2 diabetes is a lifestyle disease caused by poor dietary choices. As Professor Lustig has pointed out in several of his videos online, lifestyle doesn't explain obese six month old kids or obese newborns. As a paediatric endocrinologist, running the childhood obesity clinic at UCSF Benioff hospital and he says he has yet to meet a kid who wants to be fat, they are all desperate to be thin. He believes that Type Two diabetes is a disease caused by exposure, to the standard diet.
Research has shown us that if you have certain genes, you're more likely to get, say breast cancer. I'm not aware of any research that says if you have this gene, you're more likely to develop Type Two diabetes.
I don't say that a low carb diet will reverse diabetes, because I believe that it can only be put into remission. What we don't know, is whether those in remission, will continue to see a huge improvement, to the point where the beta cells in the pancreas regenerate. It might depend whether they are newly diagnosed when they start their journey.