Personal opinion- I think homogeneous societies cooperate much better and I personally believe that so-called forced diversity of racial backgrounds is an effort to lower the camaraderie in a team and keep the loyalty to the firm and not the team members and thus bringing down wages by competition.
I am all for diversity of ideas and background. Something which would make a companies more productive at the same wage.
I also believe that no race is superior to another- everybody has different goals. And so long as one doens't try and interfere in another's society, the world would be a very smooth place.