A Frenchman , German and Jew - all thirsty

There are three guys—a Frenchman, a German and a Jew—making their way across the desert after their car breaks down. The German says “I’m so thirsty. I must have some beer,” and the Frenchman says, “I’m so thirsty. I must have some white wine,” and the Jew says, “I’m so thirsty. I must have diabetes.”