What foods are really bad for diabetics?

High carbohydrate. Generally foods that are high in carbohydrate are considered the worst for diabetics. Of these, bread of all types is problematic as it causes a rapid rise in blood sugar. Fried foods also should be avoided secondary to high caloric value. A lot of information can be gained here. http://www.diabetes.org/food-and-fitness/food/what-can-i-eat/.