While some fruit (bananas in particular) are bad for diabetics, a lot are good for us - including apricots, raspberries, etc.
The main cause of diabetes is not fruit. Almost every meal in the entire world includes large portions of:
Wheat (including bread, muffins, pancakes, pasta, etc.)
Rice
Potatoes
Corn
Even knowing about diabetes, it can be hard to find a restaurant that does not include one of these in every single meal they serve. Yeah, whole grain versions are better - as in 10%. That's not enough. Most americans eat 3x the amount of carbs they need.
Worst of all, if the food is processed it removes fiber making it bad for you (and worse usually adds sugar). It's why even unsweetened apple sauce is bad for diabetics - loss of fiber is a major issue.
In America, Diabetes is generally caused as much by wheat as it is caused by added sugar. While it's not hard to eliminate added sugar, it's just too hard to go a day without wheat, rice, potatoes and corn.
Note, even diabetics do need some carbs, but that is NEVER a problem getting.