Sorry this is late...
You mentioned “Zulus”...
For centuries, the original Zulus have been spoken of highly by both European and Africans as a cultured, respectable, and ethical people...who just happened to be warlike and dangerous...
Comparing American savages to Zulus is unfair...
You’re thinking of the Yoruba, who were (and are) considered primitive by the both black Africans and African-Europeans: completely degenerate. Also, they were the principle source of slaves for North America for centuries, if that’s important at all.
Spread the word!!! Yoruba, not Zulu!
Read “Washing of the Spears” for an exhaustive treatise on how cultured and respectable the murdersous and backward Zulu were.