"How should a white uncle talk to his black nieces?"

A European question

Dear Emily:

I am a European man with twin nieces who are half black and half white. I’m rather worried about how hurtful it will be for them to be confronted by the racism in a society as racist as Europe’s. I think they've already had some bad experiences, but I also think the chances of worse incidents will increase as they grow up.

Being white and h…