Meanwhile, there is a growing amount of evidence that the sweetner corn based fructose may have alot to do with obesity and many of the cases of diabetes that occur. The mayo clinic gives these recommendations (http://www.mayoclinic.com/health/type-2-diabetes/DS00585/DSECTION=treatments-and-drugs) however, their opinions are based on not the why but the management.
It is my opinion that there are larger issues at work to find out why people develop the disease and are there better ways to treat it other than medication on the horizon? I also believe that what you eat determines your health in a big way. There are alternative regimens that offer non drug alternatives to management (http://altmedicine.about.com/cs/conditionsatod/a/Diabetes.htm) which may have as much or more validity that the pharmaceutical model now accepted but is of questionable long term safety. Maybe we need to rethink what we do, what we eat and make those changes a cultural phenomenon.
I do not endorse the sites I posted here but do ask you read everything and form your own opinions.