I can't fully agree with this quite yet. It's definitely interesting and thought provoking but I still believe racism is from good old fashioned ignorance as well as arrogance.
The problem with me not agreeing with this is because I don't and probably never will agree with the excuse that alcoholism is a disease. That's another excuse in our society were people are getting lazier and dumber and don't want to take responsility for their actions/screw ups. It's called addiction and it tends to be caused by doing too much of something, just like people who get addicted to food or smoking.
I'm not necessarily saying this study is a full on cop out and excuse for people that are racist to keep being racist but it's a stretch in my eyes. As far as i'm concerned racism started all that time ago simply due to people being afraid of others with different colored skin or other differences and because of that fear they overcompensated with arrogance thinking they were superior to that other race.