Try reading some black history for context, people.
The whole Wright thing isn't about Black Nationalism in the 60s political sense, or the political sense of Marcus Garvey either.
Rather, it is, nowadays, a 60s leftover that is more of a conventional cultural attitude among the African American mainstream activists, who are often as socially conservative as Jerry Falwell (like Obama's buddy the Rev Lumpkin), but moderate in it's politics, which gets channeled, as it does at Trinity, into charity works, mostly for African Americans or Africa.
So even the charity driven stuff has a separatist and black nationalist aura to it.