There isn't one. I know conservative-types love to rail on this trans shit and other culture war stuff as "far" "leftism", and at this point trying to argue against that is basically futile because there's very very few of us "left but not woke" people left. But the short of it is, this stuff isn't "left" in any economic sense: It got cooped by fedshits and ivory tower PMCs back in, like, the 70's. Ever since then, it's just been blindly attaching itself to whatever is "progressive" but doesn't disrupt the neoliberal status quo. Trans Idpol is just the latest weapon in the toolchest to keep "the left" arguing amongst itself and with other (less liberal/progressive) working-class people to avoid them actually achieving class consciousness or accomplishing anything. Social media amplified this to the point where there really is no "left", just a bunch of "LGBTQIIPXWTF++"s larping as revolutionaries from their basement on Twitchtterbook with absolutely no goal or endgame in sight, who talk a big game about how bad capitalism and how good a revolution would be, while simultaneously being unable to talk to anyone even remotely different than themselves or do any sort of useful labor. At first they were parasites on the left, but at this point, the parasite is the host and I've lost any hope of building any sort of working-class left coalition as long as these freaks hold the banner of "the left".