considering 1. I didn't call it innocent and 2. I still don't think it was racist or anything like that.

I thought it was a cute and well designed ad that pointed to some of Ford's issues.

Biologically, I think we're wired to draw to our own group. From an evolutionary standpoint, anyone who did not have this tendency ran the risk of being removed from the gene pool by leaving their natal group for an unknown and often hostile group. Over time, natural selection reinforced the tendency to remain in one's natal group. This is how physically distinct "races" formed in the first place: the same group of people choosing to interbreed with each other instead of with outsiders, over milennia.

Today, both biology, physical location, and social mores still tend to reinforce the group thing. I doubt that it is more prevalent in one party or the other.

just as much as it is a racial bias.

Since you own a computer you must be in a class that can at least put food on the table AND afford a computer.

Imagine this scenario. A policeman here's a ruckus in a poor neighborhood. A black man is holding a can of hair spray. The policeman shoots as he thinks the man is armed and dangerous.

Now you as a computer owner that can put food on the table would report on that situation most likely from the policemans point of view. The policeman was in a highcrime (classdistinction) neighborhood and was protecting himself.

If you were a young black man who lived in the neighborhood where the shooting occured, but you did not own a computer ( a class distinction ) then you would likely tell the story of the shooting from a different perspective. Why did the cops shoot my friend. He was only holding a can.

Now from which perspective do you think the media tells the story, considering that the execs and the announcers all own a computer.

Implicit in the way the story is told is class. The white person tells the policemans side. The black person tells the victims side. From which perspective do you think the media most often covers these events. Is that racist? Is it class distinction.

If the black person told the story of the shooting, he might talk about the circumstances of his troubles finding a job. (Would you hire him?) A more honest viewpoint would do a lot to get rid of racial bias.

You can pretend as much as you want. You are telling the story of the "call me" add from a white persons perspective and claiming how you are NOT racist. I would venture to guess that a black person might have a different point of view. But it is a story you do not want to hear. It makes you uncomfortable.

That helps.

But Davis' 7th district was drawn up to be black-majority at the same time that the 6th District was drawn up to be heavily Republican.

I'm sorry specter but if you don't like repetitive arguments I think you may be in the wrong place :)

I say that with no animosity, but do you really expect that our first time through any particular issue of disagreement we'll all suddenly see things the same way?

I do have to object to your continued insistence that your arguments haven't "sunk in." I have internalized them, especially seeing as I have heard them a great many times. I just reject them as false. I have heard, and, I think, understood, and yet disagreed.

Here if I may is a nutshell counterargument:
The slave from your example does indeed have a great deal of power, in that he controls his actions and he may choose to act out his racism, which is every bit as ugly as the slaveowners. Particularly when his racist actions reinforce the slaveowner's racism, or the convince the slaveowner's son of a racist point of view. He has the power to live up, or live down, to his potential and by doing so he shapes the world around him. If he chooses to be racist (and on some level it is a choice) then he is helping to perpetuate racism in general including that of the powerful (in your terms) who can act on their racism in direct ways.