@334bu
Wonder why a party whose whole reason for existing is based on scientific reality can be so ready to ignore that human beings cannot change sex? Why would they put their core message at risk? If people can say that their views on human sex are nonsense it allows climate change deniers the chance to query the Green Party"s stance on the environment.
I think the greens have fallen victim to the same problem some atheists have, which is that they adopt one position that is widely seen as rational and scientific and then instead of saying to themselves "I want to believe in scientifically verifiable things so I will believe x y z" they say "I am a scientifically minded person and I believe x y z, therefore x y z is scientifically verifiable". They tie their identify up in being rational and intelligent and stop actually bothering to check if the things they believe accord with that.
The left wing politic parties have the same problem but with virtue. Instead of thinking "we are good people so we want to support good causes" they end up thinking "we are good people therefore any cause we support is a good cause". The greens have a strong idea of themselves as science driven and progressive, and so instead of looking at the concept of gender and asking "is this science driven and progressive enough for us to support?" they say "we support this therefore it must be science driven and progressive". When other people point out that it isn't, on either point, they assume that its us who are the science deniers. At no point do they bother to actually interrogate their own beliefs because that would undermine their sense of self as being inherently good and clever.