As an atheist, I couldn't care less when or how any religious celebration is made, but you can hardly hear the word "Christmas" mentioned without someone adding that it used to be a pagan holiday, etc. Yet until fairly recently I never knew about the criminal background of Kwanzaa's founder--seems like they could mention that as frequently as they mention the Christmas/Pagan thing, since the guy is still around and those events so recent.
Agreed. Of course, in private, Kwanzaa is considered a joke by most people, including many black folk.