Two beggars were sitting next to each other. One holds a sign saying "Please help the war veteran", and the other holds a sign saying "Please help a poor Jew".
People pass by and even those who didn't intend to give money to any of them, give to the first to upset the Jew. One good man passes by, gives money equally to both, and then says to the Jew: "Why don't you change your sign? Don't you understand that nobody will give you any money?" and walks away.
As he goes, the Jews turns to the other one and says: "Haim, he would teach US business..."