This is an interesting question. Probably one point of conflict is, that in Africa masses of people are suffering from dehydration, starvation, Aids, etc., while in the US many African-Americans do not know and do not care about their relatives in Africa.
Do you know all your family tree and relatives in Africa?
In Europe it is a bit different, many Africans are there to work and send money to their family in Africa or to learn an important job like doctor or engineer and later go back to Africa to improve their communities.
Among many African-Americans you do not find such attitude, if somebody studies then he wants a good job in the US and earn much money and not to go to Africa.
Also never African-Americans demanded in the US to be relocated to Africa and be reunited with their families. Simply because they do not want to live in Africa, because living the US is better.
Well and certainly also the way of living plays a role. In Africa many people are very conservative and religious, so what they see in the media about all the gangster rappers and lifestyle from the US is nothing that they can identify with.
In foreign nations the media creates opinions and this influencs attitudes.