You nailed it, that is why they are so desperate to celebrate the 20% that is not negative. I see no problem with that. It has not caught on in a big way, nor would I expect it to. I do not understand people's hatred of it though.
Because as someone else put it,
it's another way to divide us, Started by a founding member of the loony left.
I'm not sure hate would be the word may scorn for stupidity would be better.
I don't either. If people don't feel like celebrating it they shouldn't but if others wish to then they should. Groups who've come more recently than blacks celebrate heritage weeks and different holidays, Jews have Passover and their feasts, Mexicans have posadas. We even let the Muslims have ramadan so why not let people have Kwanzaa.