I've seen article after article, tweet after tweet speculating why JK Rowling chose now to speak out and you're all wrong
Here's the real reason:
She chose to speak out now because the Scottish government have done 2 public consultations on trans rights: the first was very positive, the second hasn't been released but rumoured to be very positive also.
jk rowling's anti trans views have been consistently shown to be a minority in scotland.
what she wants is a country of 2.3m voters to have a THIRD public consultation so this time she can use her giant 15m followers to rig it.
after that, the next two instances seem to be people arguing against gender equality/feminism in favour of egalitarianism? idk, it's difficult to tell without knowing the accounts or what they were like 5 years ago.
here's where things get relevant again, though. in late 2015 it became a bit of a buzz phrase for the founder of anti trans campaign group transgender trend.
also, a disgracefully late manual RT that originated from... another anti-trans activist.