I know it's evil and racist and basically anuda shoah for me to suggest that white people have cultures, but with that out of the way it's never been too hard for whites of different ethnicities to assimilate each other's cultures within a generation because they all look the same. The only difference being language, accent, and local customs which are all fluid. Nonwhites however will never look the same and that will always be a reminder of outside obligations. It's easy enough to adopt a language, drop old taboos, and develop a taste for the local fare; but the racial difference will always result in some degree of segregation either self or externally imposed. The same scenario is true when whites move to non white lands or Africans move to east Asia or asians to South America etc. So what's driving this myth that multiracial immigration is a boon to the land that receives it?