Someone today reminded me of a joke that is well known, they say, in Ireland:

A tourist gets lost in Belfast and darkness finds him wandering around what is obviously one of the more dangerous areas. Suddenly, someone comes up behind the tourist and sticks a gun in his ribs and he hears the whispered question "So, Stranger, be ye a Catholic or be ye a Protestant?"

Thinking fast, the tourist replies "Actually, I'm neither. I'm Jewish!"

"Sure," the gunman says "but then are ye a Protestant Jew or a Catholic Jew?"