somali is an identity, not a lineage dumbass. sudanese people are considered arabs even though theyre not descended from ismaiil(peace and blessings of Allah be upon him). to be somali you must have both somali(doesnt have to be ethnic imo but some would say it does) lineage AND be muslim. you lack 1, the most important ones as even the non ethnic Madow somalis are seen as somali, more so than you.LOL what you said is literally haram. I am Somali because my lineage is there's no getting around that in your religion.
Not to mention non religious arabs exist even though Islam originated in Hejaz lakiin I'm suddenly not Somali after leaving a religion my ancestors haven't even practiced for a thousand years.
want proof of this? like I said, go back homme, proclaim your kufr and lets see how the local population will react. even you yourself know you wouldnt be seen as somali regardless of your lineage