You know in actuality if a black person made such a response to say, the celebration of George Washington's birthday (he did own slaves after all), or Confederate soldiers day (they still celebrate this in Texas) no one would care. Why should we even react to this nimnut, Kwanzaa's celebration is clearly not even his business - why does he even care, it's not a national holiday and he doesn't have to celebrate it? There are more important things to be concerned about.