The trans 'movement' was (and doubtless still is) a movement designed to remove women's rights. That is not to say that all transpeople want to do so, but we are always being told that transpeople have been around for many years, and it is only since Stonewall and the 'movement' that the cause has been used to deny women the right to meet without the presence of males.
The language has been corrupted to the point that even the most feminist of women feel obliged to qualify the word that describes us. Even apart from the Looking Glass world where we are 'people who menstruate' or 'birth-givers', everyday words such as woman and mother are meaningless when all men have to do is recite a mantra and they can count themselves in, often with legal reinforcement.
We've had a mindbending few years, but now the law has clarified things. There is, of course, a pushback from those who are not used to being told 'no' (particularly from members of the female sex) so we have to stand firm and resist it.
Good luck, LCommunity. Does your campaign need funds? If so, why not post a link, so those who want to can donate?