Time. While new Latino arrivals may be more on the outside, the families who've been around awhile are no less integrated in their communities. Same goes with Asians of various descents.

Meanwhile, let's not forget about the Know Nothing party or the Klan's activities against catholic immigrants, or the use of the term 'Paddy Wagon.'

The integration is one of culture -- of civilization.

Not of genetic material.

Because otherwise that Moorish DNA held in many Italians would sure pose problems, no?