A Job for a Jew?
Answer: The Chafetz Chaim told the story of a fellow in your situation who gave in to pressure and tried selling missionary books in a synagogue until he was stopped by the local rabbi. When he complained that his livelihood was threatened, he was promised that the next morning the rabbi would have a new job for him.
Upon arrival that morning the rabbi told him that he had spoken to the local priest who was ready to give him a job ringing the bells in his church.
"Is this a job for a Jew?" complained the fellow. "Do you expect me to work for a church and call Gentiles to prayer by ringing the bells?"
"Foolish fellow," replied the rabbi. "You are so worried about calling Gentiles to their church and you don't hesitate to sell books which will bring Jews to the church! I ask you — is this a job for a Jew?"