Think about the history of the United States. How did the U.S as a country come to be such a mixing pot of different ethnicities and colors? What we learn throughout school in history classes is that white people came to America first. Indians also known as Native-Americans were here before the whites; but the only reason they are called Indians is because Christopher Columbus thought he had found India. Later, the whites brought Africans here to become slaves. The United States and Africa are similar in the fact that just as European explorers settled in America, they also settled in Africa. To be an African does not mean to have black skin, to be African is to have roots in Africa.
Another thing that may have been connected with African-Americans not realizing Africa has whites too, is believing Africans have not experienced racism in their own country. Africans have indeed experienced racism and even today in the 21st century it continues? In some cities of South Africa whites have their own cemeteries and beaches.
To African-Immigrants, what America is to them has probably also been tainted because of the media or other things. It seems as though America has always been "The Land of Opportunity." Throughout history, people have traveled to America from every continent because America is where people can find work, or maybe even one day become well-off and live the American dream in a nice house surrounded by a white picket fence. But like some countries in Africa, America is also a nation that faces homeless-ness and starving children. In every big city there are "the projects." Many children who live in projects face real life problems everyday like trying to stay alive from gang shootouts to drug overdoses. Children starve because they don't have parents with proper parenting skills or just the money to take care of them. .
Another point to be made about the differences between African-Americans and African Immigrants are each group's manners and the way they act.