How does that even logically add up?! Your ethnicity is your bloodline and thus cannot be rejected, whilst your religion is nothing beside a belief that one, in theory, accepts or rejects. If that is too much for anyone to comprehend, either they're ignorant or just plain retards. Nobody can revoke something that is yours by right!
Nonetheless, I can see why they try to merge the faith with ethnicity. It's their attempt of trying to protect their religious identity by shoving aside anyone who rejects it.
The future is bright though. Stats show that the more educated a society becomes, the more it rejects myths and fables. It's within Somali interest to keep the people stupid if they wish to keep their religion.