Estimates vary, but from 25 to 40 percent of Ethiopia's population is Muslim. Islam can no longer be considered a "minority" religion in Ethiopia.
The children and grandchildren of Haile Selassie are descended from the Prophet. A number of Ethiopian princes have been Muslim, and though this precluded their ascending the Imperial Throne it did not prevent them from ruling in their own dominions. Empress Menen, consort of Emperor Haile Selassie, bore a descent from the Prophet through her mother, Sehin, daughter of Negus Mikael (Muhammad Ali) of Wollo. Male descendants of the Prophet are sharifs.
If Ethiopia falls-remember, this is a people who can trace their roots back to King Solomon-I don't think there's much hope for the rest of the continent.
The Copts are already undergoing a systematic extirpation at the hands of the (Islamic) Egyptian government.
I fear what will happen if they ever make any further inroads.
One of Al Qaeda's primary goals-along with the NIF of Sudan-was to create a pan-Islamic caliphate across the Horn of Africa and including every country in the region; Somalia, Djibouti, etc...
I hope that dream never comes to fruition.