Apollo
VIP
How many tens of thousands of Eritreans are fleeing each year and being accepted into Europe? How many thousands of Somalis are risking their life to cross the sea? Just put in measures that stops Somalis and lets Bantus or even helps them on the down low.
The Somali state doesn't need to actually force them to move, all it has to do is to get a good stronghold on the smuggling routes and to somehow help encourage them to move. But first we need to completely urbanize them.
You can get away with oppressing people based on class, region, possibly even religion, but the race thing is just too sensitive. No modern example besides Myanmar and what they are doing is not particularly effective.