They always see it as a discrimination issue that people can be 'educated'/shamed/bullied out of, instead of what it is: people's inherent sexuality based on millions of years of evolution.

Humans are either attracted to males, females, or both to some degree (or possibly neither), and those are complete phenotypes. Once you start artificially messing with that you cease to resemble one phenotype or the other, and won't register as a viable partner to the vast majority of people (I'm talking about the actual sexed nature of your body, not masculine/feminine attire). Then all you're left with is those whose sexuality has a miswiring, ie fetish, possibly fuelled by porn.

They're not doing themselves any favours by refusing to acknowledge this basic reality, and then feeling sorry for themselves when they come up against it, and trying to make it everyone else's problem. It's never going to change, no matter how much cajoling/crying/manipulating/screaming/ostracising/legislating they do to try to force others to see them as something they just are not, and never can be, on a really fundamental biological level.