I don't want to get into Foucault either, but isn't the problem that the people that attack FWR are completely Foucault Addled Grievance Gerbils and the women on FWR are 'ahem, no amount of Foucaultian gymnastics can ever make a male into a female because that, Sir, is reality'?
They turn up to the fight with water pistols, believing they are machine guns. When their 'useless weapons' don't achieve what they thought, they claim that we are using illegal armour that's against the rules!