The nativists of 1850 had a point, Catholic immigration led to the eventual destruction of America, if you follow demographics as closely as you seem to, then you realize that we don’t exist as “America” by sometime in the near future, for example 2050.
The land will be here, the name will be here, but it will not be what we created, or anything even close to it, or related to it.
The Engish might say it all began to go down hill after the Scotch-Irish began to come. The Puritans could no abide them and chased them out.
Face, it you are talking about an American that never was.