I recommend you to read this book (the mind of the African strongman) written by Herman j Cohen he was the usa ambassador to Mogadishu he explains how he beged siad barre to negotiate with the rebelsThat is because the apostate groups that called itself snm usc ssdf spm betrayed the nation and destroyed the unity.
Siyad Barre rahimullah was calling them for talks.
Ofcourse Xabashis didnt want that. Infact they called upon their groups to continue the fight.
Look at our situation now.
North Somalia is close to signing annexation papers. South Somalia struggles for their survival by killing occupiers.