Food Unit, in your post (Wed 03-Oct-12 17:20:00) you suggested that people of colour are people, so there was never a need to re-define the term "person" or "human," to include them.
That's not actually true. The US Constitution, which was written in 1787, refers to "people" and "person" many times throughout the text. However, it had to be subsequently amended to include all African Americans in that definition. Other federal and state legislation also had to be passed to remove other legal "artifacts" that excluded people of colour from the legal definition of person.
You may say to me that of course a person of colour IS a person and I'd agree with you. My Late Aunt Rose and others who subscribe to white supremacist ideals quite probably wouldn't. Aunt Rose believed "negroes" were something of a "sub species," the "Children of Ham" from the Old Testament, but not "people" in the way she regarded white people as "people."
She disagreed with intermarriage because that "weakened the race," and I specifically remember her saying, "because you wouldn't breed a horse to a cow." (I was one helluva nosy kid and overheard lots of these conversations with my mum!) :) She mourned the end of segregation because she believed the races shouldn't share neighbourhoods, schools, lunch counters, or public toilets.
She'd have told you she didn't have anything against Black folks, they were just different and things should be "separate but equal." But, if someone challenged her, or if she'd recently heard a story about say a white person being assaulted by a Black person, or a civil rights march was on TV, a more unsavoury attitude would start to come through.
Aunt Rose would have started telling "stories" - elderly white people being poisoned by their Black staff, white girls being raped by Black men, loose Black women coming onto white men or trying to feel up white girls in the toilets. She'd point to the cities where Black people had "ruined" once prosperous white areas. She believed Black people were naturally violent, sexually predatory and likely to take their grief out on white people, so she felt justified in not wanting them in "white only spaces."
Sorry, but I am still reminded of the parallels here - the "I don't hate trans people but I can't accept that they are like me and I don't want them in spaces that are for people like me," eventually morphing into, "I feel threatened by trans people so I want them well away from any place where I think they could harm me, I don't care what they want."