“Muslim teachers, doctors, engineers, and young graduates from the northeastern province are unemployed. Isn’t it better to give them a chance? There is no need for the presence of disbelievers,” al-Shabaab’s spokesman, Sheikh Ali Dhere, said in an audio clip posted online, referring to the counties of Garissa, Wajir and Mandera.

In the 20-minute clip, the spokesman urged Somali-Kenyans to drive all non-Muslims out if they do not leave on their own. ...