Sentence:  [...] and Black males have not taken her seriously politically (gender); and the color of her skin has marginalized her (race and "<WSD>othered</WSD>" her when compared with White women, who have also worked to silence her political views. 
Meaning of the word marked with <WSD> tags:  To regard, label(,) or treat as an "other", as not part of the same group; to view as different and alien.