The was obviously, very very few African Americans in the north before the great migration from the southern states happened. Harvard, educated Historian Thomas Sowell claims in his book, Black Rednecks and White Liberals that the tiny number of blacks who were in the north pre great migration and post slavery, had come to be treated basically just like anyone else. Then he claims that the blacks who came from the southern states ruined this, with their backwards, unlikable and self destructive culture. Thomas Sowell notes that even many blacks who were in the north pre great migration had come to resent the culture these southern had blacks brought, much less the northern whites. The same thing happened out West he claimed. Is there any good evidence of this that anyone can provide? I know it doesn't fit historical narratives but to me this would make a lot of sense. A youtube white nationalist by the name of Alternative Hypothesis, also found the same thing in his research apparently but blamed the genetics of southern blacks instead of just the culture. Thanks in advance for anyone who reply without nastiness.