Coffee and Caffeine FAQ

Where are the statistics stating that diabetics should be warned that caffeine interferes with the bodies ability to use insulin and creates 'hyperglycemia(diabetes) in 'non diabetics as well! High sugar can be fatal! I find this study to be a bit lacking in information and facts.
Just the state of being diabetic the person is considered in the same physical condition (heart) as though they have had a heart attack already (when they in fact have not) and to care for themselves as though they have.
There are warnings for people with high blood pressure and seizure disorders. Why not for everyone? That coffee does cause insulin resistance and that high sugar is extremely harmful to your health and sometimes even deadly?
Instead, in the diabetes classes (required to take) we are told that there are free foods that do not exacerbate the diabetes. These included coffee and s/f sodas!
It is known that s/f chocolate adds extra fat for flavor and know to eat with great moderation but it too, is full of caffeine! I do not overindulge in the denied foods including nearly all carbs and sugar. yet could not understand what was wrong. OMG! Caffeine!?!?!?