No, it was also the fault of the black folks who HAD TO KNOW this was a white chick, but found her useful (I guess).
What the hell are you talking about?
Like it or not, in a free country, you are who you say you are. Why you'd think a group dedicated to civil rights would give someone the third degree if she claimed to be black is simply bizarre.
She was a liar and a fraud. Her parents exposed her. She passed off her adopted brother as her son and claimed a black man was her father.
Unless you think this is a great big whopping conspiracy. In which case the NAACP risked exposure and ridicule for no good reason whatsoever from a woman who appropriated black culture to invent a new persona and identity. They didn't need her to be black at all. (They didn't really need her, period, if you think about it.) She damaged them, and herself. And she brought this on herself.