You know, that's exactly what Americans used to say about all of those awful Irish and Italian immigrants.  so terribly loud, and such drunks.  And then those Italians, yelling in that foreign language.  Heaven knew that none of them would ever become real Americans.  
And, then there were the Easter Europeans ... And after WWII, the DPs came -- all of them, ungrateful people, talking in even more foreign languages.  And then those Eastern =rite Catholics.  Some of them had married priests!  The scandal of it all.  Luckily, the RC bishops put them in their place ......
And I could go on.....
It's amazing, the people coming are from different countries, speaking different languages, with different customs, yet the response of some Americans remains constant.