Kismaayo was home to the minorities like the Bajuni. Was it ok for your clansmen to "steal" from them?Your cousins on this forum.
Kismaayo and South Somalia wasn't inhabited, save for what I believe to be some Swahili/mixed groups that live along the East African coast. Nobody was displaced or robbed, instead the place grew into a bustling trade town.
In fact, Harti and Ogaadeen fought each other for the city for ages, not other groups.
Harti even brought Gaaljecel to watch the camels as they were focused on trade. Go read the history of Kismaayo.