I have seen similar situation, i know this kid whos mother is Kenyan and father Somali people used to say He was not somali they even once tried to throw him out of masjid because they though He was not muslim. But then again if you are half white/Arab or any other white ethnicity peoe tend to like you because whitr is better but thats not always the case.
I think all of this is very limiting and we should consider people who speak Somali and love and want to see somalia succeed as somali regardless of weather they look somali or not.
Wallahi i be still remember they day they though that maskin kid from masjid be caused He was hsalf kenyan