I call [citation needed] on your EU demographics. The EU has not been "stuck in a massive population drop rate": the EU population actually grew by 3.7% between 2002 and 2001, with only 6.3% born outside of the EU. And Eurostat forecasts the population to grow very modestly between now and 2060. (Source: http://en.wikipedia.org/wiki/Demographics_of_the_European_Un...) Of course, those predictions don't mean all that much, since "demography is destiny" only in retrospect: growth trends can and do change. (E.g. the French birth rate has gone up in recent years.)
To be honest, I think you may have read too much Mark Steyn. There is little cause for demographic apocalyptics, including the tired "Muslims are going to revolt/take over" kind. In fact, a flat or slightly declining population is probably a blessing (e.g. from an environmental perspective).
The oroblem with non-whites not quite fitting in is real, though, and much worse than in the US. Besides color, muslims are pretty hard to assimilate, so there will be not only color-based racism but also cultural ethnocentrism.
Imagine you have the problems of economic class and then add another dimension of cultural class. Society becomes much more fragmented. The new dimension is not really worse than economic class, but class alone is already unpleasant. It will turn out all right, I guess, but there will be minor persistent problems for a long time.
You should note I make a difference between natural population growth and immigration. The EU's natural growth is nothing short of disastrous, and this is made up for with immigration.
To be honest, I think you may have read too much Mark Steyn. There is little cause for demographic apocalyptics, including the tired "Muslims are going to revolt/take over" kind. In fact, a flat or slightly declining population is probably a blessing (e.g. from an environmental perspective).