Good morning and Merry Christmas!
All holidays may start from a blank canvas, but the finished product does not warrant equal consideration. I am fairly confident that if that if some white, American, woman beater invented a European holiday, specifically to compete with Martin Luther King Day, you'd have no trouble dismissing it and calling it a farce. This is not an example of "what's wrong with them silly Negroes", but an example of what's wrong with them silly white liberals. Often you white liberals treat blacks like they're children. "The black man pooped a holiday out of his ass, isn't that cute." Tell me how a holiday can authentically celebrate such a diverse continent like Africa which is home to so many languages, religions and ethnicities? It's a contrived, meaningless, inauthentic holiday.
"why can't they just observe our arbitrary seasonal holiday instead". People can celebrate what they wish, though the vast majority of blacks don't celebrate Kwanza. However where people are free to do something, I am equally free to mock them for doing it.