Two beggars are sitting side by side on a street in Rome. One has a Cross in front of him; the other one the Star of David.
Many people go by, look at both beggars, but only put money into the hat of the beggar sitting behind the Cross.
The Pope comes by, stops to watch the people giving money to the beggar who holds the Cross while none give to the beggar holding the Star of David.
Finally, the Pope approaches the beggar with the Star of David and says, "My poor fellow, don't you understand? This city is the seat of Catholicism. People aren't going to give you money if you sit there with a Star of David in front of you, especially when you're sitting beside a beggar who is holding the Cross. In fact, they would probably give him more money just out of spite."
The beggar with the Star of David listened to the Pope, smiled, and turned to the beggar next to him and said, "Moishe, would you look who's trying to teach the Goldstein brothers about marketing!"