Any violence is regrettable and best avoided, but if the Afros start attacking Muslims and Hindus we could get some large scale remigration very quickly. The Afro has his shortcomings, but no better man to risk his neck and freedom for the joy of inter tribal warfare.
If the Afros can remigrate 1.5 million of our surplus foreigners, I vote we let 50k Afros settle here. But they have to totally segregate: build their own villages, brew their own beer, have their own schools and not have babies with whitey