I’d add to Roger’s arguments one more: Contemplate the Japanese. They’re extremely un-diverse and don’t do anything at all to “celebrate diversity” in the fashion of American college campuses. Somehow, they have managed to be exceptionally successful in global commerce for many decades. How could that be?

It’s because it isn’t necessary that you have an understanding of other cultures, much less an enthusiasm for them, in order to amicably buy and sell.