Hey Nadine,
I totally understand, having lived in SA for half my life, and having parents that grew up in SA. They are percieved to be ALL bad, just because SOME make up the majority of the crime.
My parents are kinda the same as your DH with the views of different races mixing. My views though are that every one is equal..i have no problem with different races mixing. This wasnt because of how my parents bought me up though. If it were up to my parents id be a bit more like them.
Personally id keep her in the mixed race child care.
She will one day be old enough to have her own opinions no matter what you end up choosing. Until then there is no harm in keeping her where she is now, and may possibly let her be a bit more open minded about these things, rather than possibly thinking that they are 'bad' people, by complately seperating her from them.

HTH??