Yes, I agree. I beleive you are referring to fructose. But what is the maximum amount permissible?
Do you check your blood sugar throughout the day? If so, you would realize that lots of fruit will raise your blood sugar significantly.
My doc told me when I was first dx'd that fasting blood sugar in the morning should be 110 or less. 2 hours postprandial (after a meal) 140 or less and to strive for a goal of 120 average daily.
I eat a little fruit, more veggies, protein, fats and as much fiber as I can stand. I usually eat a packet of oatmeal in the morning but if I want a fiber cereal, I put berries and some Splenda on it. Berries and apples are good fruits for diebetics but in moderation. They are low to medium on the glycemic scale.
I would basically check the blood sugar up to 6 times a day to start and then you will get a feel for what to eat and what to avoid.