Now. Leftists understand that in order to divide the family against itself it is necessary not to have equal rights, but rather to treat women as a moral proletarians.
You see, women are much like any of a number of groups the Left claims to speak for. And always the rationale is the same: They aren't responsible because culture or biology or capitalist exploitation is. Meanwhile, when it comes to whitey he's the only one who gets the blame.
"All struggles are class struggles," according to Marx. Women are a useful gender "class" which can be pitted against the male bourgeoisie. The family, after all, is just a relic of the bourgeois power structure, an economic construct designed to serve the capitalist overlords.