I'm not african-american, but creole Mauritian.
Our country is a former slave colony, It is still a different reality there than black people in America (as most of the white people left after the end of slavery, the country also has a large Indian community which in alot of ways took over from where the white colonialists left off with the racism towards the african's (Caste system)
I am actually a mix of both, but am mostly and consider myself creole mauritian.
I grew up and lived in Australia- lets not get into their racism particularly against Indigenous Australians.

I guess I can not answer your question exactly, but yes africans everywhere do use the phrase "we", and we include former African slaves that live in the Unites States.

I dont know if African's claim your plight but feel they should speak up in support of it?