That's going to be wrong every time you write it, that reality doesnt change.
In nature, genetic diversity is the greatest strength any species has, enabling it to adapt to new and threatening circumstances.
Within populations it's a strength as well. For example, the greatest leap in development in the US was the Industrial Revolution, when we had the huge influx of immigrants, bringing innovation, variety, new ideas, adaptability, etc. It happened again during/after WW2 when all the white men were at war and the women, the minorities, etc were drawn into the workforce.
If some limited, poorly educated and poorly socialized humans are still catching up to civilization and pretending their race is superior to prop up their own self-esteem, well, the rest of the world is gradually moving forward and making the societal leap to valuing all and integrating positively.
If conditions in some places werent so ****ty, in part because of western industrialized nations' historical interference, alot of 'forced' integration wouldnt be happening.