These two are related by one component … blood sugar.
The sugar in alcohol affects the body’s blood sugar.
An occasional drink by a well controlled diabetic allows the liver to process the sugar.
However, chronic or binge drinking presents a different scenario.
There has also been research that indicates alcohol can affect the insulin receptor cells in the brain, leading the body to become insulin resistant.
For a diabetic, in particular, drinking alcoholic beverages must be tightly managed.