Was Chewbacca the first Wookiee Leia had ever seen? She may have thought he was a normally hairy creature or an abnormally hairy creature. I don't believe it is relevant. It was the venting of negative emotions in a lazy, selfish manner. People who are not racist are still capable of this, and sometimes it manifests in an unintended racial slur.

I don't think oppression needs to exist, laziness and ignorance seem to do a pretty good job. I know people I would consider racist against white Americans because they judge them all to be as stupid and greedy as some of the decisions made by their government. To judge a group negatively based only on a selection of individuals is prejudice, if that group is a race doesn't it become racism?

Also, interpreting this from one side of the camera makes no sense. Especially when it's the wrong side. Inventing real-world issues in a fantasy universe diminishes its intended escapist value. Keeping the discussion within the Star Wars universe rather than also exploring the real-life attitudes and intentions of its creator and the resulting perceptions of its audience diminishes the value of the discussion.

The fact is that George is a racist and sub-consciously injected his prejudices into Leia's character, which it is why it is ambigous. It is not a statement but a fuzzy reflection.