I haven't heard anyone say that. Al I have heard them say is that it is unusual, which it is, and as such is a valid topic for discussion, especially when such a person puts herself forward as a 'supermum' when we all know the reality of working full time (never mind in an area like politics) and being a mother means making sacrifices with one or the other.
I am not judging or condemning anyone for making either of those choices, I am very much live and let live on that.
You feel personally attacked by criticism of Palin - I would venture that you are projecting a bit too much. Just becasue you went back to work 2 weeks after birth as she did, does not make you the same and therefore does not mean criticism of her is criticism of you.
There are many things about SP that do not add up - noticing that and discussing is is in no way sexist.
Praise the women and men who want to make it big in corporate enterprise or politics or whatever, but don't forget their are costs as well as benefits in persuing that path. There is no need for such women to lash out (in however passive agresssive way) at women who make different choices to them, unless they are already deeply uneasy with those choices and the costs incurred, in some way already.
FWIW, why should women strive for what men have, if they don;t want to? Why not admit to liking pink because men have long thought it frivolous? A new gebneration of young women are not jumping through these self imposed hoops, and good luck to them, however they decide to live their lives becasue they are probably one fo teh first generations to do so without the spectre of male approval hanging over their shoulders - unlike SP.
If it is sexist to discuss that conundrum, then political correctness has just dissapeared up it's own arse and good riddance to it!