Yes he can, as the moderate intake of honey with diabetes improves many complications associated with diabetes, where honey benefits in lowering some elevated liver enzymes, reducing the level of high triglycerides, reducing the cumulative blood sugar ( Hb A1c ), raising the level of good cholesterol, and stimulating pancreas  to secrete natural insulin, also combination of honey and antidiabetic medications contributes to improving response of body’s cells to insulin, thus reducing glucose in the blood.
Note:
A moderate dose of honey for type II diabetic patients is one teaspoon every 12 hours. As regard type I diabetics where the pancreas is non functioning, it is better for these patients to eat royal jelly and propolis which suppress the damage caused by free radicals by the anti oxidants found in propolis and royal jelly besides their other benefits of boosting immunity and other benefits.
Types of Honey suitable for diabetics from Mujezat Al-Shifa Company: _ *
(Super Propolis Honey – Regular Propolis Honey) The merging of Sidr honey with propolis and royal jelly as a powerful antioxidant that protects the body from free radicals forming inside it which is the causative agents for many chronic diseases such as diabetes and joint pain. These honey enhance the effect of antibiotics, inhibiting the growth of many Microbes and stimulates the pancreatic glands
acacia honey: stimulates the pancreas to secrete insulin, regulates blood     sugar, and stimulates blood circulation.
Yemeni Sumar honey: It is considered an easy-to-digest food that can easily reach the stomach, rapidly absorbed and reaches easily into the blood circulation. It helps in getting rid of digestive disorders, relieving them, cleansing the intestines, and reducing blood sugar through stimulation of  pancreas to secrete insulin, so that type II diabetics can use Sumar honey instead of sugar
Super Manuka Honey: Manuka honey with Indian bitter squash increases insulin levels, thus helping diabetics in controling blood sugar. Indian bitter squash contains compounds that act as anti-diabetic, as it helps cells consume sugar molecules and increase insulin secretion.