That's racial ignorance. You have to understand that in any country where you are the majority the minority will always be treated indifferent if that majority put any kind of system in place to benefit the majority and disenfranchise the minority. The minority holds no power over those that are in control. I'm not going to assume much about Nigeria, but in her culture that may have been the ideology set in the blithely ignorant minds by those that are willfully ignorant to those outside of their culture. In this world you have those that are willfully ignorant and those that are blithely ignorant. The willful ignorant teaches the blithely. But she can assume all she wants, she can't prove it, take it away from you, make laws, put it in European schools or "blackwash" it in European films because she is of the minority with no power. She is telling her views from her culture where if that where you were it would be racist, because now you have been more than just offended but disenfranchised, oppressed.