alt Hacker NewsFeminism is not femininity and so is not to be contrasted with masculinity [1].
Feminism is originally about gender (power-) equality (and so is orthogonal to femininity and masculinity), but has been extended to other forms of power equality. I think that in this context it's about concern for certain things that established practices don't show concern for. Such concern could perhaps translate to certain power dynamics.
[1]: One of the feminist icons in recent popular culture is Ron Swanson from Parks and Recreation, who is also an icon of butch masculinity. I don't know if he would have loved or hated this. On the one hand, the description sounds hippy, which he would have hated; on the other hand, it's about do-it-yourself, non-industrial craftsmenship, which he would have loved.
Yes, that's exactly the focus of modern feminist studies. Figures like Donna Haraway have pushed for a field of study that goes beyond identities of womanhood.
> She advocates for political organizing based on "affinity"—conscious coalitions and political choices—rather than essentialist identities based on biology or shared oppression.