The problem is the overreach. Very few people would care if trans people just did whatever they wanted to do without insisting that everyone else validate their own opinion of themselves, and attacking anyone who disagreed as hateful transphobic bigots.
I'm happy for transmen and transwomen to call themselves transmen and transwomen, but not happy for them to call themselves "men" and "women". Because they aren’t. Other mammals have words that show whether the adult is a biological male or a biological female, so why can’t we? Whatever cosmetic surgery a bull had, whatever hormones it took, it wouldn't magically become a cow.
I have gay and lesbian friends and family who are appalled at the way Stonewall has succeeded in joining two disparate groups of people as if they have the same interests, when they don’t. Being gay or lesbian is simply about sexual attraction, and it’s ridiculous that a heterosexual biological male can announce that he is really a woman and is therefore a lesbian and entitled to join lesbian groups online and in real life.
It’s appalling that youngsters in the turmoil of the teenage years are encouraged to think that if they feel they don’t fit in with the stereotypes of "boy" or "girl" they might really be the other sex, and should go ahead with actions or medical treatment that will change the course of their whole life irrevocably, when they are too young to understand the full implications.
There's a lot more fuss about transwomen because it’s an objective fact that females are on average weaker and more vulnerable to male attack, and males are on average stronger, more aggressive and more likely to attack others. Statistics show that transwomen retain male patterns of violence, including sexual violence. Look at the huge number of messages threatening murder and rape received by people like JK Rowling. I don’t think many of them will be from transmen.
Women are historically a marginalised and oppressed group, and are now told they have to accept into their group any male who says he is "authentically" (!) a woman and so he must be allowed to take places on programmes and shortlists that have been reserved for women. When the UN has a trans woman as its first "UK Women Champion" the cliche "the world has gone mad" seems appropriate.
To me the whole thing is no different from Rachel Dolezal, the white woman who says she is black because she feels black. Yet she is not applauded and black people are not reviled for disagreeing with her self-identification.
How can a biological girl say she "feels like a boy" or a biological boy say he "feels like a girl" when they have no idea what it feels like to be the opposite sex? All they can be going on is their stereotyped idea of what girls and boys "should" feel like. A boy who likes playing with dolls and wearing dresses may or may not grow up to be gay, but he will still be in a sub-set of the category "man", not a sub-set of the category "woman". The whole trans idea is based on regressive stereotypes.
Well, you did ask!