I'm O and I have real pancreas issues.
I don't believe that a certain blood group will be susceptible to any particular type of diabetes.
There are many, many reasons why people get diabetes and other endocrine problems, I'm not certain wether blood type comes into it. It's more likely in your genes. With the obvious weirdos, to spoil a good theory!
If everyone on this site put in their blood type, we could work on figures with % to % of population.
Long time ago I read that groups A & B were from Middle East and India, Os more European,
Os then more prevalent in the USA due to Euoropean migration, not sure if USA 1st nation blood group was mentioned.