I think that poster is just a naive gay activist who has no idea what's going on. It's worth being reminded sometimes that that is how a lot of the "pro trans" people are - it isn't that they've looked at the issue and made a rational decision that gender is more important than biological sex, that male bodied people should be able to get boners in female dressing rooms by calling themselves women, that female bodied people should be able to match with you on grindr by identifying as gay men, that doctors should ignore your reproductive organs, statistics should comply with your fantasies, teenagers should be neutered if they aren't gender conforming, that women's prisons & shelters also house fully functioning males who can cause pregnancy, as long as they change their pronouns ... or any of the rest of it. They just think, oh can't we all just get along, why are they being mean to drag queens.

To anyone who isn't aware, that's not it. Most of us are 100% on board with gender non-conformity. There are plenty of old school trans people who are against the modern trans movement. Go do some research. Look up "gender critical" or 4th wave feminism or Miranda Yardley or Jane Claire Jones or just dig around a bit, there are plenty of perspectives and various degrees of reasonableness, but the current pro-Trans movement has definitely gone off the deep end. You don't want to support it without having a closer look.