Why did the dog jump into the pool?
because he was a hot dog !
The main argument in this piece is that Black English is termed as its' own distinct language, white English or dissimilar to American. Black English is not simply a dialect of English but its' own language.
Language is a way of expressing yourself, as well as in Black English does exactly the same way, by expressing the kind of lives that black people had lived. The overcoming of slavery is being represented by the development of their languages and submission to the American people during that period of time.
Since their development under more extreme circumstances and different, it has enriched the culture of African American which made them recognize Black English as their language.
I believe that the first quote is the answer because it says that their minds are poisoned early by importance, saying that hereditary rulers are raised to feel that they are more important and can do no bad.