Diversity weakens cultures. They use the melting pot of so long ago ( those cultures looking for work in a free america) to stratify their position that diversity is good. If you want to easily take away an identity... diversity.
Potowatomi Indians... stripped of their cultural heritage... clothing, religion, food, forced to speak English, go to Catholic schools and what happened? Their language is almost gone, few speakers left, health issues in abundance because their natural diet was removed, they don’t practice Catholicism but have returned to their belief system. It decimated the Potowatomi Indians.
Let’s be so diverse no one knows who they are anymore.... but I think that’s the point.