A Negro insurrection would send a lot of erstwhile liberals to the gun shops. And they would not be using their newly acquired arms in defense of the insurrectionists.
https://www.facebook.com/wralford/posts/10152260228641933
...Slave-holders in the Antebellum South echoed their Aristocratic forebears in believing that they were doing black slaves a service by managing their lives and making their physical abilities productive. Otherwise, they would be living the short, brutish lives of savages. This idea is carried forth to this day as the Party of Jim Crow still holds that blacks and other minorities cannot take care of themselves w/o help from whites [and minorities who have been properly vetted] who are are smarter and know better. The idea that minorities could be empowered to see to their own personal and economic security is viewed with a combination of fear and derision by the Left.
At the same time in the Southland, there are militia groups that train together and include Negroes in a significant proportion. The Negroes tend to be the ex sergeants and know haw to handle and treat weapons. They have the same concerns as their white comrades. They will defend each other and each others' families.