It seems to me that in the modern day (let's say the last half century or so) that all the different dietary choices by the vast majority of people on this planet have not shown immunity to at least part of the population of people developing Type 2 Diabetes. In short, there are vegetarians with the condition, vegans with the condition, meat eaters, pescaterians etc etc within all groups there are those who go on to develope T2. We may not be fully cognizant about the causes of our condition, though we have a pretty good working theory, but one thing binds us all in that we make decisions on how we choose to combat the disease based on our own beliefs. For one section to demonise another is wrong but can be ignored, when groups join forces to
negate the ethos of others is bullying a point across. It also seems to me that this happens in other areas of human behaviour such as religion or politics but that is an area for another forum.
Edited to include missing word.