Diversity is a strength because it has been an American hallmark from the beginning.

Leaving aside the massive Spanish influence in the Southwest and Florida and considering the Anglo portion of the country, first it was the English and Scots.  Then the Irish were grudgingly accepted.  Then the Germans and Scandinavians.  Then the Italians and Russians.  And on and on.  Oh, and we can't forget the unwilling blacks in the South and then elsewhere.

That's a pretty diverse country.  And it has been that way for a long time, including that supposed high-water mark of the so-called "greatest generation.

Diversity is and always has been a strength in this country.