Yea, Nakia was preaching that stuff long before T'Challa knew about Killmonger. In fact, T'Challa was in the middle of contemplating the two opposing philosophies of Nakia (share resources/outreach with blacks) and W'Kabi (just conquer the damn world) before he got interrupted by news of Klaw in Korea, which became the domino effect that led to everything spiraling out of control... and bringing him right back to that walk in the marketplace with Nakia at the end, where he finally gives his decision.
Ironically, W'Kabi was so furious by the outside world, likely due to Klaw killing his parents in the boarder attack, that he sided with Erik off gp of him handing him Klaw's dead body... not knowing that it was Erik's father who enabled Klaw to cause the boarder attack that killed his parents to begin with. Or that the only reason T'Challa failed to bring Klaw to him, was because of Erik's sneak attack after T'Challa, Okoye and Nakia had basically killed 98% of Klaw's men and detached his arm.
It was really a lot of great interwoven layers of story telling throughout.
at the "Boyz N The Hood" story with his dad in the theater.
I really hope someone tries it. 
