The truth is that, whatever our physical form may be, we scare the shit out of you, and offend you to your very core. Our mere existence is an insult to your sensibilities and everything you stand for, and you’ll never feel entirely safe until we’re not just morally, but legally mandated out of existence.
It’s not just transgender people, though; these wackos are afraid of MEN IN GENERAL. Transwomen are scary because they’re “men who fool people into thinking they’re women”, and transmen are scary because they’re “traitors”, but ultimately, the fear is of men and anything to do with men. Which is why almost all TERF ranting will eventually get to the point where it’s PENIS PENIS PENIS PENIS.
A lot of them think men are inherently violent and a second away from raping the first women they see, and they desperately need to cling to patriarchal gender norms so they can tell at a glance if someone is a EVIL MAN. The irony is, this is the same general reason that fundamentalist Christians also insist on patriarchal gender norms, except that they want to treat women with less respect…