Do you have a link to the exact quote? If the exact quote is anything near what you've posted, it's absolutely incendiary. Thanks!
Here is the link:
http://online.wsj.com/article/best_of_the_web_today.html
It was a piece by James Taranto at WSJ Online on March 19
James Cohen wrote in his 1969 book, Black Theology and Black Power, at p. 15, “Blacks do hate whites, but black hatred is not racism.”
I think that explains a lot of Obama’s twattle on the topic.