That's a good point; as others already answered, it means "shelters", and they impose the word "shelter" on women's prisons. So they do realize that separate prisons are there for a reason, and probably the idea is that all women-only places are shelters of a sort, regarding privacy and protection. So it is even less understandable why they would allow "carefully selected" (not) males to cross this boundary.
Also they put the emphasis on the word "right-wing" as being "the only people who abuse the law" instead of the word that matters: "man".
In the nitter post mentioned above, one can see that other users linked some articles for FFF which report on other tw in women's prisons attacking other inmates.
However, some media, including the TAZ (leftie newspaper) also added that the ministry of justice can prohibit tw in women's prisons when it is "obvious" that the declaration is meant in a bad spirit.
On another note, thanks to the FFF comments I noticed that there is a new blog by Rona Duwe (Let Women Speak-activist) specifically for the upcoming national election in Germany. For any MN in Germany or interested in the subject:
https://was-ist-eine-frau.de/
("What is a woman?")
She checks all of the election campaigns against GC standards and has questionnaires for candidates, or which voters can use as a checklist if they wish.