I think it was actually started to attack the horrendous sexism displayed by some posters on the other thread and to point out how appalling it is that some types of bigotry are regarded as unacceptable while others go unchallenged.
i accept that it was a thread about a thread, however - but in the interest of seeing fair play, there were at least four threads started about that thread since it began. I do hope all of those have been deleted - although the one I was just reading had got to 700-odd posts so maybe not 
Given that, you must forgive me for not being entirely convinced by your explanation, HelenMumsnet, but thank you very much for providing one.