I have read a few articles on this subject. Very interesting! Maybe both T1 ad T2 are autoimmune diseases. The following paragraph is the conclusion made in the article.
"The possibility is certain! I am sure people will be relieved to see new proves that will show that they didn’t bring this disease on themselves by being over-weight or obese. Also people might also suspect that their diabetes might have been contributed to by toxins and chemical, which are associated with autoimmunity. Now that autoimmunity seems to be involved in both type 1 and type 2 diabetes, we cannot say for sure if the rancour between the two groups of condition will still continue but as Engleman said that even as the result of their research 'strongly suggest that immune modulation should be considered as a potential human therapy', 'diet and exercise are still the best ways to prevent type-2 diabetes in humans' until these effects can be successfully proven in humans."