This is what I find most frustrating about how lefty men handle this. Because I can see how if someone didn't know much about the issue, they''d think "trans rights = LGB/minority/progressive rights, people who have a problem with any of that are probably right-wing bigots."
But you would think that when something comes up to contradict that worldview, you'd change it. Like when you hear from women who are feminists, lesbians, left-wing, all the above, and very obviously not reactionary bigots saying "no there's a very real issue here, please listen." You would THINK at this point that they'd go "hang on a minute, I might have got this wrong somewhere."
But no, they never, ever do. Because that would mean actually listening to women, and why bother doing that.