Believers often think disagreement isn't in good faith. We are all limited by the things we believe without evidence. I'm sorry to have to insist that the idea we are all contaminated by racism is one. Children are born with no concept of race. The idea that they all accept the idea is no odder than the idea that they, at some point, all accept capitalism or Christianity.

Mind you, I once believed as you did. When I took the IAT, I fully expected it to reveal I had at least a slight bias for white people. Turns out I had a slight bias for black people. When I then thought about my past, that made sense.