Good call OP. Sorry for the essay, I've got a lot to get of my chest.
I think it's more dangerous and pervasive than a religion, but I think widely recognising it as a belief system is really important.
Pluckrose and Lindsay in Cynical Theories look in detail at this issue and I think what they say makes alot of sense.
They are not lone voices but they have made it very accessible. They see gender activism as a secular ideology, a significant part of the Social Justice Movement, which though seemingly innocent and charmingly titled is a very well padded out counter culture framework (more like communism than a religion, though something entirely new)
Pluckrose and Lindsay postulate that Queer Theory is the purest example in the SJM of reified postmodern thought in action.
An entire collective consciousness that believes as fact, that any dominant cultural meta narrative is just part of an incumbent power structure, race /collonialism, feminism/patriachy, gender/sex binaries (even academia, science and the scientific process itself) which are inherantly unjust should be "queered" or inverted. That truth itself is just the dominant discourse on a given structure and language is the way that "truth" is crafted.
Trans people in the traditional sense (i.e. intense dysphoria, so severe they need to transition for their mental wellbeing) and the LGB community are part of the existing binary, hence they are just tangental to the cause.
Thus all the labels of the non binary dictionary, TRA's, the TWAW mantra are at the frontline of changing language and discourse, not trans people and their rights. They appear to be centered but they are not.
They have made an abstract set of ideas (queer theory) into a concrete actionable revolutionary goal, the goal is to cause chaos and disrupt the meaning of things by "Queering" them. That women, actual Trans people and some gender non conforming people are being materially harmed is just collateral damage to the greater goal of the unmaking of the normal/ the status quo
I don't think most 'adherents' are conciously aware of the framework they are caught up in, they have no idea they are part of undermining the very liberal society which is (slowly and imperfectly) delivering true social justice.
Though it is utterly incomprehensible, the trans agenda is to fuck with language and its meaning to the point that normal itself is changed and thus alter the meta narrative and invert the power dynamic. I think that is why many feminists are sold, they think it inverts the power dynamic of the patriachy. Think Contrapoints and Alex drummond. It does not.
Of course it also opens the door to sports cheats, predators, misogynists, men with mummy issues, any one with a kink they haven't been able to openly indulge until now, and it platforms snowflakes and drama lammas, though I think that is tangental.
On a superficial level, it's very idealistic. It apeals to good people who are sensitive to real and existing, injustices in society, in the same way that Communism appealled to people who were sensitive to socioeconomic structural inequality. , it's just bonkers.
I do think that the beginning of the end is when normal people start to wake up to belief element, and that the way forward must come from liberal process and discourse, or the far right will eventually force it to a conclusion and that will be much, much worse. Like Nazism rose in response to communism. Vive la révolution libérale!