how has our government gone along with it? By not banning foreign language signs in the US? yeah, again I will take personal freedom there.
our government used to give out 40 acres and mule, and some variants of that for a long time to bring in immigrants. even after 1700s there were periods of time with as much immigrant population as we are seeing today relatively speaking in percentages.
https://www.migrationpolicy.org/programs/data-hub/charts/immigrant-population-over-time
it has always been a case of those who immigrated didn't assimilate very well. go to any major population of immigrants and you will find a disgruntled American complaining about them. Germans, Irish, Hungarians, the other eastern european nations. give it a couple generations and America will look largely the same, just maybe a bit tanner, and shorter.
Jews speak English but are very much not assimilated to our culture, and you go into most Jewish shops and you are going to see more Hebrew than English. The various Mennonites, Quakers and the like are allowed to very much live outside our culture and customs. often the best part of many areas is that they haven't assimilated. Helen Georgia is leaning on probably a faux-German background. how many Asia/China Towns, here in Atlanta I am going to Bufford highway to get all sorts of unassimilated good eating. You tell me what particular type of asian you are looking for and I can tell you how many miles away from Atlanta you need to drive on Bufford Highway to find it.
and I am not really sure they should be taking on our culture. too many grifters wanting freebies, we need those immigrants to keep their hard working ways, and not to give into the rampant consumerism that has ruined almost every generation of American. we are too obsessed on things, ease, and comfort. if you ask me our American culture is the one that needs to assimilate and better itself.