That's incredible for so many reasons, especially when you consider Voltaire died in 1788, the year Byron was born.
Well, you attack youandme's factual assertion (which is false), the message is still true, I quote:
"As a result of a hierarchy of nations, Negroes are thus slaves of other men ... a people that sells its own children is more condemnable than the buyer; this commerce demonstrates our superiority; he who gives himself a master was born to have one."
AND:
"It is a serious question among them whether [the Africans] are descended from monkeys or whether
the monkeys come from them. Our wise men have said that man was created in the image of God. Now here is a lovely image of the Divine Maker: a flat and black nose with little or hardly any intelligence. A time will doubtless come when these animals will know how to cultivate the land well, beautify their houses and gardens, and know the paths of the stars: one needs time for everything."
Check the highlighted text in second quote, quite amazing!
His thoughts on islam still ring true to this day tho:
"But that a camel-merchant should stir up insurrection in his village; that in league with some miserable followers he persuades them that he talks with the angel Gabriel; that he boasts of having been carried to heaven, where he received in part this unintelligible book, each page of which makes common sense shudder; that, to pay homage to this book, he delivers his country to iron and flame; that he cuts the throats of fathers and kidnaps daughters; that he gives to the defeated the choice of his religion or death: this is assuredly nothing any man can excuse, at least if he was not born a Turk, or if superstition has not extinguished all natural light in him."
Note Voltaire asserts some aspects of islamism which still ring true (unfortunately) today.