They got absolutely shredded by the next comment too,

"Could you clarify what exactly your internal moral voice objects to? The school curriculums basically boil down to “Most people are either men or women. Some people aren’t, and that’s okay - you should still treat them like anyone else.” Does your internal moral voice object to any part of that, or is it something else I am missing here?

Do you also disagree with schools teaching kids in a similar fashion about the existence of left-handed people, redheaded people, or handicapped people?"