Why doesn't Les worry about whether people like what he teaches?
He does not worry whether people like his teaching because he never taught for monetary return, so he is not dependent on audience approval. He takes his stand without compromise, recognizing that he is responsible only to the author of the book and handles that responsibility seriously.
Les explains that he refuses to call those Jewish believers Christians simply because the Bible doesn't. He knows he stands alone, and that is alright. He has never taught classes or even on television with the idea of any monetary return, so he does not have to worry about whether people like it or not. If someone does not want to come back, it is no skin off his nose; one gentleman did come back later and became one of his best students. He can take his stand without compromise because he is responsible only to the author of the book, and he handles it realizing what a tremendous responsibility it is.