The Northern Africans were black!
Other Nations have come there and have mixed with the Indiegous North Africans there are still black Africans in Algeria and other places.

not exactly,but i agree that the ancient kemetians were black people and i agree that parts of the magreb had black populations and still do tothis day.
Mixing in modern day egypt is not quite like that,but many recent immigrants over the last 100 years in loweer egypt,which probally had a mixture of costal type berber populations.
upper egypt has been prdominatly black since the pre dynastic times and archeology and anthropology proves this.
The other black populations in northern africa are the tuarege,tibbu,haratin,and others that live in mostly southern algeria and morocco.
Irecommend you read shomaka keita and some of the points he makes about the ethnic make up of northern africa.