The fact that Tara did not know the signification of the word "Holocaust" and had no knowledge of race issues in the United States is very telling. Not only does it show that her father's decision of not enrolling his children in school is very idiotic (in my opinion), it also shows that ignorance is very banalized in a country that was literally built on slavery and racism for centuries. In a way, I'm glad that Tara finally learned those things in her history class, because she now knows that some things that her brothers say are inappropriate despite not being able to change their minds…