On assimilation: this is not a hard question for anyone who has ever heard of "Chinatown." Many major cities have one. They are there because Chinese people didn't necessarily want to give up their language and culture to melt into white bread. And yet, somehow, white people have enjoyed Chinatowns for decades.
In New York City alone, there are something like 100+ different ethnic enclaves. Some of them might be familiar. Next to Chinatown was Little Italy. Astoria in Queens is primarily Greek. Greenbelt is Polish. Boro Park is Orthodox Jewish. El Barrio is Puerto Rican. Jackson Heights is desi. 3rd Ave around 9th street is "Little Tokyo."
In Chicago, different ethnic groups retained their distinct identities for decades after arrival, and to this day there are ethnic clusterings.
There have been many movies about this topic. Big Night is about an Italian family and an Italian neighbor trying to find a way to exist without compromising ideals about food. My Big Fat Greek Wedding is about, yes, Greek people with their own traditions. There was a Vine star named Rudy Mancuso who made a pretty good movie a few years ago -- he's Brazilian and he lives in a Brazilian enclave in New Jersey, Ironbound.
Assimilation has never been an American tradition -- not en masse, anyway. Everyone is free to "assimilate" if they choose. Some Chinese people want to live in Chinatown; others want to move to the burbs next to predominantly white neighbors. Either one is OK. It's not a problem.
