I'm not sure there is a prescribed British "culture".
As has been seen on Gransnet, the way people view the world and behave within it can be very different, even for people who were born in this country.
We have various religious branches/ethnic/cultural groups within this country, including various "branches" of Christianity, Judaism,Buddhism, Islam, Hinduism, Sikhism, etc etc. We do not all have the same beliefs and values or the same lifestyles and I think Gransnet demonstrates that point quite clearly.
In terms of their official position within society, these women are relatively powerless, although some might feel they are either brave or unwise to stand firm in the face of intimidation. To suggest that they are "up yours" ladies is an unfair and unsupported presumption and says more about your attitude towards them than theirs towards you.
It is, in my view, more likely to become a "growing ideology" if women like this are made to feel hated and like social outcasts. Why on earth would they want to interact with people who have such an extremely low and hateful opinion of them?