This thread is not full of generalisations of men as a sex🙄. It's a thread about the condescending, patronising, misogynistic and creepy men who have joined Mumsnet.
But to be fair, loads of posters have been using 'men' as a shorthand for , and synonymous with, condescending, patronising, misogynistic and creepy men.
If you don't want any men at all to have access to a huge discussion forum, because they are male, and you would like it to be for women only (even though the owners have repeatedly said that men are welcome) - then that's a perfectly valid opinion to have; but this thread (and all of the others we have regularly on the same subject) have been full of "Men always...", "Men do this..." - in a way which tars every male poster as the same as the repugnant ones.
Saying "I don't want men on here because they are [all] creepy, patronising, misogynistic, sex-obsessed" is just dishonest and actually very reminiscent of the way that the misogynists view and talk to women, only with different negative sweeping assumptions.
Nobody would dream for a second of claiming that all Nigerians are online scammers or that all Muslims are terrorists, just because a small number clearly are and should obviously bear the full consequences of their chosen behaviours. Is that really the low bar that people on MN want to set for themselves on what is otherwise an (overall) extremely wise, canny, thinking and intelligent site?