Many people in SA, NZ, Australia, Canada, US and other colonies who think they are white are in fact mixed race. There are many whites in SA who have black blood and vice versa. There are also many Americans who have Indian blood. It's just that they don't look very black, or white or Indian although some have features which betray them. Coloureds in SA are multifactorial. They have Indonesian blood, Indian blood, Pakistani blood, White blood (German, Dutch, French, Portuguese, English, Scottish),
Hottentot/San blood and of course Black blood. Of course not all have this mix but its a pretty heterogenous group of people. Even among them there are intermarriage issues.
Inter-racial marriage shouldn't be an issue but because of prejudices on both sides it often is. The children may also have problems: both sides may reject them. Its also not just reserved to race but also to ethnicity and language. German mother, French father = child ??? Then Lutheran German father, Catholic French mother = child ???
Not to mention that the French, Germans, English and others dislike each other too, especially the older folks.
At the end of the day its not this guy's problem. People shouldn't call him a racist though but he should either find a different employment or if he really objects to it partner with another justice who does not and refer all mixed marriages to him, but his motives should not be racially motivated. It seems as if he's just cynical in what he sees in terms of acceptance by 'pure' races of the mixed children - both black and white groups may reject the mixed kid or maybe not.