What should one do if he was reading with a group in the books of the scholars, and they are described as "the group of the People of the Book"?

Question:
May Allah reward you. This questioner says: We are a group of classmates in a school, some of whom are committed and some are not. The first group, the committed ones, have a day on which they gather and study some books together. There is a classmate from the other group who calls us "the group of the People of the Book." Is that statement permissible?

Answer:
Leave him alone and continue with what you are doing; he will not cause you to fail. Leave him and his words; keep away from them. Yes.