Racists will seethe but this is the future. We're all going to be mixed race eventually. Every ethnic group is the product of race-mixing today. It's inevitable.
All it takes is 1 generation of your family for this to happen. It can be a naive granddaughter meeting an African man at University or an unlucky son who strikes out and decides to try his luck in a distant land.
You racists may hate to think about it but it is guaranteed that one of your descendants will be race mixed...
I ask you this, would your mixed-race descendent be proud of you? What happens if he or she has an inkling of you inside them and is similar mentally... I'm talking about thought processes/neural patterns/soul.. Would you be capable of loving him or her? What would he do to make you proud?