Posie Parker's statement about that tweet:
Around the same time I had allowed my temper to get the better of me and tweet an off the cuff comment to a trans activist on the day of the Irish abortion result. The activist was one of many talking about abortion being a cis privilege and exclusionary for transwomen and transmen. "Women who think they're men should be sterilised" I think this was an aggressive, but in context, tweet. As I, obviously, don't support eugenics or forced sterilisation I didn't anticipate it would be used to suggest I held these views. I understand that there are some extreme sensitivities around the suggestion of sterilisation and I had not intended to flare up any of those. I guess I was pretty stupid to think these words would not be taken as read or, worse, even more weight to be put upon them. I believe in a woman's complete autonomy over her reproduction.
www.theposieparker.com/statement-about-tweets-and-wpuk