It should prove interesting to see how this situation evolves in France. How well France can assimilate large numbers of immigrants may depend on how long heavy immigration continues, and if it keeps getting larger each year. If they are being overwhelmed with poor & under-educated African immigrants, it's almost analogous to immigrants from Mexico to the U.S.
France is a somewhat different situation since it has been overwhelmed in recent years by African immigrants that are relatively poor and uneducated. That has raised a number of questions within the country. However, those questions appear to be getting addressed in a manner that assumes that the African population will be fiully assimilated within French culture through full access to educational resources, jobs, housing, and open acceptance of intermarriage. None of those countries has a history comparable to ours of legal discrimination. None of those countries has a history and tradition of relegating blacks to an economic and social underclass.