Im Nigerian but Ive always seen African American as a nationality.... to be honest nationality is somewhat of a false construct....
most modern countries in Africa are less than 60 years old, artificially drawn up by the colonialists ...
to most Africans, tribe >> nationality ......
Im Nigerian and my tribe is yoruba, I don't share the same ancestry as the ibo tribe for example, we don't share the same language, rulers, customs...etc , on a cultural level I have as much in common with an Ibo person as I do a Ghanian or African American....
However even though we are different we come together to form one nation..... The things that make me Nigerian are alien to my culture as a Yoruba person and I guess thats the same for all the other tribes....