Talia Lavin is one of the best writers on white supremacy and online/offline radicalisation, and this piece is very good: Why Transphobia Is at the Heart of the White Power Movement.
gender nonconformity threatens a worldview that is fixated on immutable, straitened, and antiquated gender roles. In this violent milieu, white women are designated as walking wombs, meant to replenish the purportedly declining birthrates of the white race, and little else. (Nonwhite women are portrayed as threats and grotesques, objects of violent misogyny.) Chastity, submission, and silence are their desired qualities in women.