True Story: My sister has a lot of Arab coworkers. One of them also sold used cars on the side. One day, one of the Jewish girls heard him speaking on the phone trying to sell a car to another Arab. She was really surprised to hear him speaking in hebrew (since he was speaking to another Arab.) When he got off the phone, she asked him why he was speaking in hebrew to an Arab? He said, “What? Are you crazy? You think an Arab would buy a used car from another Arab?”
I did not make this story up.