The key insight is that women have always been more [economically] left-wing than men, but that women were also more religious (both vs today and vs men) and that this was a moderating force against those left-wing views.
With religion in retreat, those views now take voice.
Given the renewed interest in political gender gaps, especially amongst younger voters, I thought I'd place these debates in context and link to a few pieces by myself and others which have investigated these questions in Britain and beyond... 1/12