That work was already laid in by the KKK.
Many southern Negroes had been migrating north from the start of WWII and were replacing the men drafted in the factories. They were overcoming union resistance and setting up households. That was continuing into the early 60s when the WoP slammed the door to advancement by giving money for not working and kicking husbands out of the household by giving AFDC liberally to the women and requiring that no husband be in the house to receive the “free” money. The propaganda got going strong then that no Negro can succeed without the help of the Government. KKK still existed as Democrat enforcers but was much weaker than it had been before the war.