It's unfounded to hate groups of people for no reason.
Cal is at a convince store, seeing the new owner, Steve, at the register is Iranian.
Cal wants to express his insecurity that there will be no people of Cal's race at convenience stores anymore.
Cal asks for a job to make sure people like Cal still have jobs at convenience stores.
Cal tells Steve to go back to his own country and stop taking away jobs from Americans.
Steve is honored that a person like Cal would want to work for him, and they develop a lasting friendship.
Steve feels hurt and unwelcome in the country and distrusts people like Cal from then on.