You seem to think that unless people who are official, card-carrying, dues-paying Communists are also official, card-carrying, dues-paying NAACP members, the penetration has not occurred. That if one cannot find documentation showing checks made out to the CPUSA, penetration has not occurred.
Ideas don't work that way. Penetration and subsequent influence is revealed not in membership lists and money trails alone. It's revealed in attitudes. It's revealed in how an entire culture has been altered, radically altered. What do you suppose the objective you mentioned WAS? I'll tell you: it was to weaken the American ethic of work, individualism, and self-reliance, something that was just as much a part of black culture as white.... until recently. Blacks built entire towns before the Marxist influence crippled them and turned them into wards of the state.
Another goal was to foment class warfare. Since even the poor in America are well-fed and have a lot of the luxuries that would amaze a family in Vietnam, Communists replaced class warfare with race warfare, and have been doing their best to encourage racial hatred. Black separatism is very much a result of Marxist influence.
And notice how the word "minorities" now refers to Latinos and African-Americans, and that's pretty much it? Why do you suppose that is? I'll tell you why: most Asian-Americans, Indian-Americans, and Arab-Americans have escaped or emigrated from oppressive Marxist or theocratic regimes... they embrace the American ethic (unless they're Islamist infiltrators, another topic altogether, yet not so very different.)
But Latinos are the second tier of Communist influence, and have not yet suffered enough Killing Fields to learn to hate Marxism. Thus you have African-Americans and Latinos united under pictures of Che Guevara. Do you understand what I'm saying now?