Transphobe

A person who is sick of narcissistic mentally unwell men gaslighting people to try to make it socially acceptable to abuse women and children, because they delusionally believe that they are women (or mentally unwell women who delusionally believe they are men).

Mary is transphobe because she is tired of being gas lighted into believing that men can believe themselves to be women and she has to accept it or be a transphobe.