Ah, I thought by "black organization" you meant an exclusively black organization. The NAACP's founders include white people like Mary White Ovington, a socialist, and Du Bois moved on from the NAACP and became a communist, so obviously, socialists can do both class and race while fans of capitalism only do race.

The Crisis was the NAACP's magazine, so mentioning it seems redundant, though I will note that it also had white workers.

As for Malcolm, my favorite quote:

“I believe that there will be a clash between those who want freedom, justice and equality for everyone and those who want to continue the systems of exploitation. I believe that there will be that kind of clash, but I don’t think that it will be based upon the color of the skin.” — Malcolm X, 1965