America has been a cultural cesspool since it was founded. Sure we have our Hemingways and Ellingtons, but they have always been outnumbered by the Yellow Press, Pulp Novels, "reality shows" and other such dreck that have dominated mass culture from the beginning.
My fear is that we are letting in too many POOR people who will vote us into Socialism. I fear that there is no hope, even if we started a ZERO immigration policy tomorrow.
As far as the "cultural" aspect, there are some negatives, but I could care less what language you speak, what music you listen too and what food you eat. All I ask is that you don't claim that I OWE YOU A LIVING and that you leave ME the f--k alone!
When I go into a store or call a firm with a sales inquiry, I like to be able to communicate with the person who's servicing me.