What do you hope to achieve by prioritizing graduates of below-average domestic schools over graduates of some of the best universities in the world? Pay your dues to the man? Someone who graduates from a decent school can be productive at any company in the world, but a Doldrum State graduate is just a health hazard.
As for fitting in, back when when Soviet Russia came apart we had quite a few Russians at my university. They were all academics in their mid-40s and managed extremely well.