Al Shabab support Farmaajo. They're both centralists who use force to undermine regional entities. They both use divide and rule tactics on clans that rebel against them. Once Farmaajo gets, reelected Al Shabab will give him a cakewalk to Buaale. Why would they do that you may ask; simple, Farmaajo will declare a PNG on the Kenyan Troops in Lower Jubba and let Al Shabab build a Shadow administration in Kismayo with the shirt of the government. He'll than most likely Move Laftagreen to Barawe as the capital of South West and realse Robow on Bay iyo Bakool. This is a deal Al Shabab and the government reached. Amisom will than be withdrawn by 2023. If your asking why Farmaajo isn't fighting Al Shabab, you're crazy because they're exactly why he's still in power.