@Eglwysfach - worrying about how law and policy being upended, at women's expense, to better suit natal males - how could any decent feminist protest? 
The move towards a consumerist understanding of gender, and the conflation of gender with sex, poses an existential threat to women's rights, because if you can't define what a woman is then protections are in name only, and all single sex provision, protection, competition and recognition disappears. That's the reality of what all of this means, as increasing numbers of people are realising. And you know what an intelligent person does, when confronted with overwhelming evidence disproving their position? They change their mind. That's what most of us did, because most of us started out where you are, and researched this at all to prove gender critical women wrong. They were not wrong. Hence the focus on 'NoDebate and no-platforming. Once the discussion is open, extremist gender ideology falls apart, because it is not supported by empirical fact. I would suggest that you engage in good faith, and have the conversation, instead of lecturing and hectoring. The facts may surprise you.
If your idea of 'decency' is for women to be threatened with rape and murder, and abused, and silenced, when they try to talk about what altering the very definition of 'woman' may mean in law and practice, then may I suggest you re-examine your allegiances?
There is nothing left wing about an individualist conception of only a pick'n'mix gender having validity, and the erasure of sex - and with that, the fact that every single human being ever to exist at all did so solely because of the huge amount of reproductive labour undertaken by a woman, and that women all around the world suffer extreme violence, abuse, and oppression solely because of that biological sex. That reinforces male privilege, and removes any capacity to discuss and recognise structural oppression based on sex. It's the most neo-liberal perspective imaginable. And you say women here lack decency, and leftwing concern for other people!