For those who are unfamiliar, the basic tenet of radical feminism is that the source of women's oppression is the patriarchy (OK so far, if reductionist), which is run by and for men (broadly true), and thus men are all inherently bad (whoops that's where they lose me).

In many cases, it's an ideology that ends up repeating many of the aspects of Christian fundamentalist patriarchy, just from a different angle: men and women are fundamentally different; biology dictates your role in society; etc.