I think some of the brothers/sisters are trying to say is that at least in your heart you should accept a mate that is not part of your tribe/culture. If your parents do not approve then that is their business, but as far as you are concerned it should remain a possibility. If your heart is closed to outsiders than their is no chance for getting married to outside the tribe, if your heart is open maybe Allah (swt) will bless you with a pious husband not from your culture. The main objective is to get married to a good man, not a good somali man.