To a certain degree i don't think their ignorance has to do much with being amerimutts or not. It's just a question of delving into the topic or not even if i have suspicions that it also has to do with a nationalist sentiment.

Many stay in the shallow area of "I don't like darkies and i don't want them around me" and they don't go much further. And then there are those that join only because of the aesthetics.