We’re not talking historically but, we’re talking now, and without even checking I can say with certainty the white population of Africa is under 1%
The UK is 100% a white country, Being British is an ethnicity, there’s black people who live in Britian and I’m sure are very patriotic etc, but they’re British only in name, this is a simple fact
If I moved to Japan, Nigeria or Iraq tomorrow and had children there and they became the most patriotic citizens the country has ever seen it still will never make them Japanese Nigerian or Iraqi