My experience is with white collar blacks, and with a small number of exceptions, they were Michelle Obamas with less charm, full of themselves and always suggesting that their (barely adequate to the job) talents were under-appreciated. They had the arrogance of Harvard grads without the Harvard pedigree.
I’ve worked with them in both blue- and white-collar environments (the office work being much longer and more recent), and it is much worse now. In the blue-collar workplace, they were much more on par with whites (for the work involved), and therefore less hostile; in the white-collar world, the talent gap is huge - beginning with command of the English language, and branching out into everything else (mathematics, technology, basic work ethic). Any that put on airs would quickly see how much they lagged in meetings where they only understood two out of every three words.