What these text books and the courses are really about is promoting Marxism. The racism that they teach is wedge used to separate the minority from the society as a whole.
Once the minority feels that they can never be a part of the larger successful society it is easy to indoctrinate them see Marxism as the path to their empowerment. The goal is to enlist an army of socialist agitators for future Occupy Wall Street movements.
Of course you are correct that the hopelessness that these books inspire condems the indoctrinated to the underclass. If they believe that the system will never permit them to succeed they will never try.
I could never understand how people could so resent the system that lifted them out of their Mexican toilet.