Summary
This quote suggests that prejudice arises from a lack of understanding or knowledge about a particular subject. When individuals are uninformed or unaware of the reality or nuances of a certain matter, it becomes easier for them to form negative opinions and judgments. Being "down" on something implies a negative attitude, and "not up" on something suggests a lack of knowledge or familiarity. Therefore, the quote suggests that prejudice can be avoided by actively seeking to understand and becoming informed about diverse perspectives and experiences.