Your idea that "blacks" now aren't going to change is refuted by the ever-increasing chorus of black voices speaking out against the Dems, against Hollywood, in support of Trump and the Republican Party.
And while it's true that many of the current generation are lost, rehabilitation of local economies through de-regulation, the re-establishment of law and order, and the reduction/elimination of entitlement programs will reestablish the educational system in cities and rehabilitate the black family for future generations.