10%? If you only look at Southern Somalia they are 25-30% of the population. You're downplaying their real numbers.
Just because beesha Madowweyne handle most of the construction of Xamar doesn’t mean they are suddenly 25% of southern Somalia. Sspot loves to pull shit out of ass. 1-2 bantus on a video and now everybody south of Galkacyo is theirs.
Somalia has TFR of 6.8. Bantus don’t have any exclusive land, they might have their own villages and neighbourhoods but thats it. Even those are shared.