Yes it must be immensely frustrating as a Type 2, as sufferers are often painted as individuals inflicted it in on themselves.
But to play Devil's advocate...
I think the general populace just see the statistics and the headlines, the facts are that 85% of Type 2 diabetics are overweight and have BMI's over 25, which is a well established risk factor for Type 2s, as highlighted by the recent report Type 2 diabetics make up ~90% of all diabetic diagnoses and diabetes is costing the NHS billions every year.
Of course Joe public is going to be concerned and have an opinion on it and why shouldn't they?
When I look around it's rare to see an adult that isn't carrying excess weight, many don't understand food macros, don't calorie count and don't really have a clue what they are putting into their bodies. It only requires to overeat by a few hundred calories a day (a BLT sandwich or a large morning latte) consistently and you'll slowly gain weight year in year out.
Creating a calorific deficit is the keystone to fat and weightloss, it's boring and it takes real self discipline, in a country of over abundance and excess calories in everything it's very difficult to achieve, but it is achievable. Will the majority bother.. No.
In my experience, people don't like to admit that they overeat and always over estimate the calories they are expending and underestimate the calories they are consuming. Any person I've seen religiously keep a food diary and weigh and measure what they are eating and drinking for a week or two under estimate by an average of 800-1000 calories a day, this is even allowing for the fact they tend to behave better knowing they are keeping a food diary.
I just don't buy the.. (slow metabolism, thyroid, genetics) means I can't lose weight and my actions and lifestyle choices have had no impact on my diagnoses as a diabetic.
Set up a controlled experiment and restrict someones calories in a hospital setting they will lose weight, staple a persons stomach they tend to lose weight. Genetics are always subject to environmental factors, you can be genetically predisposed to something e.g. diabetes and obesity/poor life style will trigger this. Just like it's probably not wise for a child of a schizophrenic parent to take vast amounts of mind altering drugs during their teens, the environment (e.g. personal choices, diet, lifestyle) is just as important as the genetic aspect here.
I don't mean to inflame or insult fellow diabetics Type 2 or or otherwise, but I struggle to argue against the public perception that if the majority (there are of course exceptions to this rule) took responsibility for their condition/lifestyle, lost weight, didn't overeat and educated themselves then we would see a much lower incidence of Type 2 in the general population and much lower costs to the NHS.
If people had such habits installed in them through socialisation from an early age and there was a real push for education in this are I think Type 2 diabetes diagnoses would reduce.
My main worry is the demonisation of diabetics in general, it will only take continued negative media coverage around the costs of diabetes and the wider public will be in support of lowering costs and it will lead to a reduction in quality of access to treatment for all diabetics. I truly believe in a few years economic arguments will be used to limit supplies and treatments and treatment quality will start going backwards, we are all ready on the way.
So yes I do get a big peeved when I go to clinic and see a morbidly obese Type 2 in a wheel chair, blaming their diabetes and it's impacts on everything but themselves, all the while with a 2ltr bottle of coke in their lap that they are taking large gulps from every few minutes whilst waiting.
Or my Type 2 colleage who brings five pieces of fruit to work a day, a double round of sandwiches, crisps and "diet" drink who then complains his sugar is never below 12mmol. His partner is a nurse!