Diversity is good if the absence of diversity is evil.
Where is it written that the absence of diversity is evil?
We did quite well for 200 years without using the word diversity or being obsessed with the concept as it is applied today.
I went to school with and grew up with people from many different backgrounds and races and no one ever used that term or lost sleep over the fact there were too many or too few people of one type or another.
Did you ever hear of D.P.'s? Shorthand for Displaced Persons?
After WWII we had a large influx of people from all over the world who were generally classified as D.P.'s.
It didn't take long for them to learn English, learn our ways, fit right in and become Americans.
They came here to join us, to become Americans and live as Americans - not to insist we adjust to their culture and change America to accommodate them.
There is a lot of wisdom and truth in this old adage:
United we stand - Divided we fall.
Diversity is the opposite of unity.