My sister-in-law is Kenyan, and she has been quite vocal about letting the family know when she's had negative interactions. I will tell you, nothing will spark me to violence faster than seeing someone making a racist remark about my cute little 2 year old niece. The interesting thing is that most of the remarks I've been informed about aren't about the fact that sister-in-law and niece are black, but that it's a "shame" my brother married her. That infuriates me more than anyone can possibly know, because what most people don't know is that my grandfather's eldest sister was disowned by the family for marrying, of all possiblities, an Englishman. They love each other in as deep and abiding a fashion as my grandparents, and that's the only thing that matters.
It was interesting watching my brother introduce my sister-in-law to my grandparents when they first started dating, because my grandparents being who they were immediately treated her as part of the family. Their only concern was the education difference at the time - she was working on a Master's degree, and thus the question was whether or not my brother would be seeking to obtain one of his own (he is).
But the real core of this story is that my great-grandmother was sufficient of a racist that it was figured the best way to sort out my grandfather's "behavioural issues" (which ultimately proved to be the result of the fact that he, like me, was somewhere on the extreme high end of the autism spectrum) was to re-enroll him in a different school after he was essentially expelled unfairly for something that was never fully disclosed. Specifically, a school in which my grandfather was the only white student for the rest of his elementary career (about six years. This also means that he attended the same school as Dwayne Johnson's uncles). While this resulted in my grandfather having to physically defend himself on a daily basis for a period of at least three weeks, it also backfired tremendously, and ensured that my grandfather would never allow racist sentiment a place in his soul. And a half-dozen lifelong friendships.
This of course, also meant that he knocked the teeth out of a teacher in high school for making racist remarks about the girl he was taking to a dance, which again resulted in his expulsion and having to continue his education in New Brunswick. As this led to his being scouted for the hockey team at Acadia and a trip to a hockey tournament in Toronto, whereupon he mistakenly took the luggage of a girl visiting Canada from Michigan on a school trip, I have to admit that my grandfather's rather violent refusal to accept a racist way of thinking is directly responsible for my existence.
I obviously don't deny that racism and prejudice exists, but the simple fact of the matter is - you have to give people the choice to give it up themselves, you can't force it upon them.