There's almost 0 state efforts to preserve the cultural identities of immigrants of any kind
When people celebrate "diversity" in the West, it's just eating shawarma, drinking boba, watching Anime, listening to kpop, and eating at an Ethiopian restaurant. Pure commodification and consumerism masquerading as celebration and promotion of foreign cultures
Or you'll have people fetishizing about spicy latinas, lightskins, and Asians like they're fucking Pokemon cards
Neil Gaiman's "American Gods" is a fun exploration of this. All gods who were powerful and revered in the places where they came from, are shells of their former selves, brought over by the people who have migrated here or been forced to come to the US otherwise, but unable to flourish because in the US there is no room for sincere belief and worship, which is what fuels their power. Instead, Media, Technology, and Globalization have become powerful gods on their own, because people will worship at their altar while thinking they worship other gods, or no gods at all.