And the brutality against black Americans during slavery and later was far worse than going to the back of the bus, as was the treatment of black South Africans under the Afrikaner regime, yes?
My point had to do with the fact that it isn't rare that people who are mixed to some degree are often the most rabid racists. After all, the laws were promulgated at a time when some rumors must still have been current. Another piece of evidence is that instead of using a genetic or genealogical measure, they based legal distinctions solely on appearance until very late in the history of the regime. The psychology is interesting.
Of course, no matter what treatment the blacks received, it wouldn't justify the murder of white South Africans.
I would also be careful with the use of the word "genocide". It's disrespectful to people like Jews and Armenians who actually did suffer a genocide.
Btw, along these lines there's the case of the black looking daughter of two "white" Afrikaners, who was re-classified and relegated to "Coloured" or black society. The reclassification was based solely on her appearance. I remember reading that there was all sorts of swill peddled about how the mother must have had an affair with a black man. Much later a paternity test was administered, and other dna testing, and it was proved she was the biological daughter of her legal parents. They eventually changed the law to say the biological child of two white parents could not be re-classified, but what difference would it have made. She would still have been an outcast, as the parents were, as if this possibility was catching, like a cold or a virus. Poor people.
Sandra Laing:
https://www.theguardian.com/theguardian/2003/mar/17/features11.g2