In a white-dominated race hierarchy, where it is assumed that white people are better than black people and that white stereotypes are superior to black stereotypes, there is no greater threat than the existence of trans racial blacks, who despite being born white and inheriting white privilege "choose" to be black instead.
By embracing our own blackness and black stereotypes, we, in a sense, cast a shadow of doubt over the supposed supremacy of whiteness and white stereotypes.
Thanks bro, now if only we could get some white people to pretend to be black to end racism once and for all.