"rather it is his failure to acquire the realization that there is only one human race on this planet and that it originates from Africa"

Then your points regarding diversity and nativity are non-arguments and baseless. If there is only one human race then particularities, that is, what we call "culture" or "race", are illusory and constitute an impingement on the one human race since the particularities only serve as divisions.

Yet, arguing for the "human race" is still racism precisely because it argues for one race over all others, "others" being the fact that different races, segments and sub-segments of those races have existed for centuries.

Now, the 'Humanism' you seem to argue for isn't exactly based on a Humanistic conception of humanity, in any philosophical or even anthropological sense. Instead, its extremer because it adheres purely to biologism since you claim that Africa is the one origin of this race, race being defined by biology. You are thus exposed to be, not only a "racist", but a biological one. This trick permits you to implicitly state that, though we are all biologically one race, all others are derivations of the Africa genome, and this permits you to imply that all differences amongst the race, however illusory, are nonetheless dependent on Africa because Africa is now the origin of the race's biology and thus atop the hierarchy that has been casually imposed.

In summa, your final statement that, "As such, all people are validated from their respective cultures", is absolutely nonsensical because by this point in your tirade you have committed three fatal contradictions. These occured, of course, because your rant is exactly what it occuses others of being and has absolutely no intellectual strength whatsoever, and thus no credibility, unless you consider brutishness credible. Yet, that is supposedly what you are opposing, right? Or do you simply oppose the existence of whites? Unconsciously, the latter is certainly the truth.