It's wrong to harass someone because of religious differences.
John doesn't know any Jewish people but notices one at the bus stop.
John wants to talk to the Jewish person.
John introduces himself to the Jewish person as he would do so with anybody else.
John uses slang terms to get the Jewish person's attention and asks a question that alludes to stereotypes about Jewish people.
The Jewish person enjoys a friendly little chat with John.
The Jewish person is greatly offended by John's remarks and yells at John.