None of those things existed in continental African culture?
A lot to say in response to this. First, and probably most important, is the accumulation of wealth, which wasn't part of any African culture in an economically mobilized way--there were no plantations, in other words. Wealth and kingship/royalty were inseparable. There were certainly displays of wealth and authority, and African rulers had what we would call slaves; but they weren't predicated on an economic system that demanded a labor base.
Second, "Continental African culture" isn't homogeneous--Dixie culture was, at least in terms of its socioeconomic organization. Continental Africa was home to an indeterminate number of different communities, states, cities, etc. Some were organized according to institutional hierarchies and relied on displays of power based on wealth, patriarchal systems, and institutional violence. Others were organized differently, and many likely exhibited very few of these things, if any.
Third, the practices and habits of Africans changed dramatically after they were brought to the colonies, and families were routinely separated. To the extent that violence occurred between slaves in the colonies, it likely had little to nothing to do with traditions carried over from Africa and more to do with survival in a ruthless system of utter exploitation, oppression, and debasement. To the extent that African children learned cultural habits involving violence, patriarchy, and wealth, it's far more likely they learned from their observations of the American South than from parents or elders.
In short, sure, those things existed in Africa; but they existed in the South is a far more organized, cohesive, and consistent way. It's virtually impossible that African American culture today is derived from traditional practices in pre-colonial Africa (aside from conscious efforts to re-incorporate certain innocuous elements).
120+ years later, hip hop is somehow Robert E Lee's fault.
It's not
not his fault, to use your parlance.
