Maybe, maybe not.  National Institute of Alcohol Abuse and Alcoholism:

"The findings suggest that it is unlikely that Native Americans carry a genetic variant that predisposes them to alcoholism. Certain variants of ADH and ADLH do have a protective affect against alcoholism in some Native American people; however, these findings do not explain the high incidence of alcoholism in the tribes that were studied.






https://pubs.niaaa.nih.gov/publications/arh301/3-4.htm