Diversity doesn’t work.
A society which is unified requires the fewest rules, police and government interventions. Culture is a superior method for enforcing values because it does not require enforcers. Ordinary citizens enforce it by ostracizing those who do not meet its standards.
Without that culture — which unifies vital measures as disparate as the value system, identity, and social pressures — only government can enforce standards. What inevitably results is a Nanny State that makes many rules, sets up lots of detail-fixated bureaucrats, and grows like a cancer, enriching itself.
The problem with diversity is that instead of culture, it chooses anti-culture, or the culture of having no culture. It’s an extension of the idea of freedom, which is that you don’t have any positive goals, but share a negative goal, which is agreeing to have no goals.
A person in a culture afflicted with diversity — known also by its synonyms internationalism, multiculturalism and cosmopolitanism — faces an ugly choice: they can either join the culture of non-culture and give up on their own values, or they can retain their own values and be socially ostracized or treated as a stereotype.
Diversity always leads to the same thing. Society simultaneously widens its tolerance while demanding more government interference to enforce basic rules. This becomes too much, and soon third-world levels of criminality, corruption, low hygiene and disorder descend.
Look at most countries on earth. Most of them are of mixed race, culture and religion. Over time, this became an anti-culture which settled on the lowest common denominator, which means that no one has much in common. People just want to get rich and escape such societies. There is no actual joy.