Isn't abstaining from alcohol naturally recommended for diabetes?

My in-laws have a family history of diabetes. As a result, my husband also has diabetes. However, he can't quit drinking. I don't think alcohol is good for diabetes, but when he gets checked, his numbers come back normal, so he doesn't seem to realize the seriousness. My brother-in-law also passed away due to diabetes complications, so I feel very frustrated.

While checking the groom's blood sugar, I also checked mine and mine is normal. I really hope you will abstain from alcohol.