FUNK, questioning what you're told doesn't make you a white supremacist.
I might be way out there, so to speak, but the past isn't necessarily true. Yes, certain things happened, but what those events mean are going to be spun to fit what is currently considered 'right'; or what will justify the current situation.
Let's take a look at some Rage Against the Machine lyrics:
Who controls the past now controls the future
Who controls the present now controls the past
Who controls the past now controls the future
Who controls the present now?
-- from Testify (The Battle of Los Angeles, 1999)
I don't think being black or white or anything is going to make you a better speaker. From what I know, my ancestry comes from Western Europe--but what does that mean when it comes to anything? I might not be discriminated against in the southern United States, I guess.
What about Emma Goldman? She was a good public speaker (so I read), and she was Jewish. What does it mean to be Jewish? Is that a religion or a 'race' or both? Even though I'm some pale guy with Western European ancestry, if I convert to Judaism, am I any less of a Jew because I'm not from the Middle East?
If I became a great Jewish public speaker and advocate of Judaism, would my point be lost because I'm white? Would my work become less significant?
What makes you think its Douglass's 'whiteness' that made him a good orator? Couldn't it have been an inner desire to learn and improve? Does this desire, if it exists at all, exist within all people? Are you suggesting that there have been no good speakers from the African continent, or that it's not possible for a good speaker to be from there?
---
I think the examples that were given of differences between South Americans and Africans is proof of the idea that race is a social construct. If everyone could see it, then it would probably be safe to say it is 'there'; but if you have to keep pointing out to me how someone has a slightly different nose... :/