[SauronOfMordor]

Othello wasn’t even black. He was supposed to be a Moor, a North African. North Africans, although darker than Europeans, are still Caucasian, not sub-Saharan black.

[Varda]

You're right the Moors are Caucasian. The problem is that England and America have different definitions of “white” and “black”.

The English have labeled Othello “black”, so Americans interpret the character as a sub- Saharan Negroid.