The following paragraph sums up several pages of data:
In short, major social transformations within the black community were having an impact in their economic condition. It would hardly be surprising if it also has an impact on how whites viewed blacks, as had happened [in a previous wave] in the nineteenth century. The civil rights legislation of the 1960s may well have been an effect of the rise of blacks, rather than the sole or predominant cause of that rise, as it has been represented as being, by those leaders — black and white — with incentives to magnify their own role in racial progress.Thomas Sowell, Black Rednecks and White Liberals, p. 51
If you want to see the reactions of those with incentives to magnify their own role, go find this book on Goodreads and check out the 1-star reviews.