I would’ve raised Hell.
All it would have taken was one person in the audience to stand up and say … what are you singing? Oh, to have been in that crowd, jail would have been my next destination. ;-)
I’ve been to many black events where this song was sung. I’ve never heard it in the presence of white people. I’m surprised this occurred and am not quite sure what the point was supposed to be - once Obama becomes president we all start singing ‘Lift Every Voice’ instead of the National Anthem?