That actually sounds like KJK is advocating for little girls to take puberty blockers and then testosterone: "women who call themselves men should be sterilised" - because that is the outcome.
However, we know that she advocates the complete opposite.
If the tweet had been shown in context, it would be clear what she was angry about. This comment was part of a conversation, not a random statement out of the blue.
It was about those particular "women who call themselves men" who decide to continue taking testosterone throughout their pregnancy, knowing but not caring that this would harm their babies, babies that they inexplicably want to bear despite all aspects of being female allegedly triggering the most frightful "gender dysphoria".
Not the cleverest way to express her concern but since it is not something she or anyone else is lobbying for as a condition of "gender reassignment", I think "women who call themselves men" can rest easy in their beds.
Meanwhile, on another side of town, "Decapitate TERFs" signs, men (if I am not misgendering them) carrying a mock guillotine, actual violence against women who dare to want to meet to discuss women's rights and safeguarding children.
Anything to say about that?
Oh yes! I remember. Males must be excused their threats and violence on the grounds of their "frustration", "natural anger", etc.
Direct threats and actual violence are "excusable" but not a woman's frustration at the abject narcissism of females who deliberately risk serious harm to their own babies, with repercussions into childhood and adult life.