"I don't care if a guy changes his gender but he has no right to expect me to think of him as a woman."

Why should you think about him at all? Why be concerned about the gender, the sex life or the genitals of some person you encounter in the street or at the grocery store? What difference does it make?

When one person encounters another, the logical response is ordinary courtesy. Feelings of disapproval or self-righteousness just burn up your energy and raise your blood pressure for no good reason.