Diversity in and of itself is not a “good” thing.
As we have found throughout the history of man, different can be good, can be bad. It depends on many criteria as which it turns out to be.
When I think of diversity I think back to when BillyBob had his major heart surgery.The doctors involved in his care,about a half dozen IIRC,held a press conference after the surgery.Every one of them was a white male.You'd think that BillyBob,the nation's first black President,would make sure that the team "looked like America".
Diversity for thee,but none for me.
Historically, the mono-ethnic societies and countries have fared far better than “diverse” societies and countries.