Just one little correction:
In Germany the percentage of bi-national marriages was 26.2% in 2004. In Switzerland it is even higher, it stands at 34%.
What is Todd's background? Perhaps one should invite him to Brussels sometime and arrange a joint event with LocustWatch. "The USA appears destined by fate to plague America with misery in the name of liberty." Simon Bolivar, Caracas, 1819
I believe Todd is a sociologist. (BTW, "After the Empire" having been mentioned, note: he partly descends from the USA!) Inviting experts along with LocustWatch has been debated but finally rejected (I proposed Swiss economist Fredmund Malik, big opponent of US voodoo economics and the use of HPI in GDP calculations). *Lunatic*, n. One whose delusions are out of fashion.