Re: "it assumes race creates an accent and speech patterns"
How about we refer to homo sapiens as the human race and stop calling each other black and white?
Look at the gentleman in the picture above the article. The device in front of him is black. The color does not match his skin.
On a related note, I resent being labeled "white". When I put my hand on a piece of white printer paper it becomes quite obvious that my skin is not white. According to a paint scanner at the home improvement store it's a hue of red, actually. Yes, I did put my hand in it.
This division of people into different groups called "races" is scientifically wrong-headed, especially if you look at the genetic make-up of different groups. It can also be exceedingly dangerous, as the theory of evolution dictates that different groups would have evolved differently and possibly at different rates. And yes, I'm sidestepping the debate about species.
"I have a dream that my four little children will one day live in a nation where they will not be judged by the color of their skin but by the content of their character."
Dr. Martin Luther King Jr., August 28, 1963