Complex sentence: Wilson affirmed that the purpose of education for black people is to secure their survival in the world and any school--regardless of prestige--that failed to provide blacks with the tools necessary for this task was in fact mis-educating them.
Split into simpler sentences: Wilson affirmed that the purpose of education for black people was to secure their survival in the world. Thus, any school regardless of quality or prestige that failed to provide blacks with the tools necessary for meeting this task was, in fact mis-educating them.