That is the problem ..right there .. "positive identification"... 
If Al Shabaab continue to attack and Nyeuthis feel insecure .. and have no mechanism  tell an Al Shabaab terrorist from a kawaida Somali...  they may end up forming an anti Al Shabaab vigilante group taking the law into their own hands .. Since there is no identification mechanism ...  it would end up being a Somalis vs "rest of the world" witch-hunting / civil war..

So ... you can imagine the chaos ... .. any slim jamaa with curly hair and/or a taste for miraa and/or a bad habit of spitting ovyo ovyo ... will be a potential mob justice victim.. ..   eg. Evan Ikua ...   (just kidding heh heh heh )