Cis people's bigotry toward us has ALWAYS been about cis people's fears and insecurity about how they relate to and rely upon patriarchal norms to define themselves, to delineate the shape and behaviors of their sexuality, and to guide their place in the strata of social hierarchy.
Many of them can't see this or understand their own deeply irrational responses because their reaction is bound in such a gut-level patriarchal prejudice that has been inculcated in them since birth.