Probably my favorite MU villain, Killmonger was very nuanced compared to most of them. And the social questions he raised were really complicated. The movie handled its message on that fine line between being overbearing and being sympathetic. A flawed, realistic view of the complex issue of "so what can be done to improve the lot of blacks in America?"
But ... I'm concerned at the mixed messages as well. One could argue that Wakanda really only prospered as much as it did precisely because it built a "wall" and was isolationist, ala Trump's vision of America. How would it have been different had they shared the Vibranium with the world from the get go? Like the Middle East, I presume, with everyone fighting for those resources.
Moving forward, will they truly embrace the vision of Nakia and T'Challa - that they are strong enough to defend their borders while still aiding the world and taking in refugees?