What does anything you say have to do with my point? I don't care about the rest of the Muslim community, Somalia is ethno-religious. So let's stick to the point.
Tell me how am I clutching at straws by naming ethno-religious groups?
Ofcourse I'm not talking about blood (did I literally not say that before???), I'm talking about the social-theological concept. You have to be humble and understand what ethno-religion means instead of telling me that I'm clutching at straws. If you're a Somali gaal then by definition you're not socially Somali, it's a fact.
The bit in bold I agree with as the Somali culture is centred around Islamic traditions.
So, they cannot fully be seen as being part of the Somali community. The moment you renounce Islam, your Somalinimo is revoked in a sense as you no longer share the values that are upheld as incredibly important in the community.
The only real confusion with saying they are not Somali at all is because in that situation we are denying their lineages, which is something we cannot take away or change. Example, if a person from an ethnoreligious background, lets say Greek (Greek orthodox followers) converts to Islam, does he stop being Greek? He can he deny his association with a group that are culturally and ethnically interwoven with Greek Orthodoxy?
Btw, I agree with your point with regards to them not being Somali culturally and socially. But saying they're not Somali fullstop raises too many confusing questions in my mind.