It depends, sometimes people put their foot in it/don't realise what they're saying. I ignore sometimes, other times I say something. I've been known to say ignorant things and am glad friends have pulled me up on it.

So glad my group of friends is very multi-cultural. Juniors cousins are half Vietnamese, close friends kids are half Indian, I've got Anglo-Saxon family, Aboriginal family, & Maori family. It's awesome