I agree that type 2 diabetes is reversible, but those nutjobs aren't helping the cause either. For one, raw food diets are bullshit. For two, giving up caffeine and meat has nothing to do with the path of action of type 2 diabetes. For three, it is missing (or at least deemphasizing) the importance of exercise.
I was thinking about typing up a really detailed response detailing human physiology but I'm sure some lurker would snag the info for their own health or diabetes niche site. I'll save that for my own site, thanks!
The most important step to reversing diabetes is exercising every single day. It does not have to be intense exercise by any means - just a 30-45 minute walk will work wonders. The reason behind this is that there are various enzymes involved in the metabolism and absorption of glucose. These enzyme levels drop dramatically when you are completely sedentary, and rise significantly with regular activity. Noticeable changes in enzyme levels can occur in just 24 hours of non-activity. This is why people who are on bed rest can enter diabetic or pre-diabetic states even if they are otherwise healthy, young, and have no family history.
The next most important step is losing weight. I don't care how you do it, as long as its gone. Full fat cells induce immune activity and produce inflammatory compounds that interfere with glucose absorption. Fun fact: before insulin, they used to successfully treat type 2 diabetes in the obese via high-dose aspirin - that of course was before they realized that such treatment lead to liver failure.
The third and by far least important step is dietary change. If you exercise every day and get down to a relatively low body fat, you can reverse type 2 diabetes even when drinking soda and eating fruity pebbles every damn day. Maybe the most far-gone individuals may need to watch their carbs but it really is a minor step in the process.
That documentary is bullshit and pisses me off just as much as big pharma stuff. They are trying to sell vegan raw diets as the cure to diabetes, and it's just vegan propaganda. Daily exercise and weight loss are the keys to reversing type 2 diabetes, not eating only vegetables and refusing to cook any of your food. This is important because most people are not willing to adopt a raw vegan diet and would rather just stick to insulin.