What makes an abnormal gender, sexual, species or whatever identity more special than any other abnormality? I enjoy collecting bones and have buried roadkill to later collect the bones, but I can't talk about it in most groups or I'm discriminated against. Where the hell is MY white knight internet crusader for equality?
Point being that everyone is unique, people have quirks, and not everyone is cool with those quirks. Straight, 'normal' identity weirdos experience just as much discrimination as these oversensitive obsessionists. An identity encompasses the entire scope of a person's essence, not just how they feel about their genitals or those of others.