You know, though, this makes me think of a scenario I'd really have to think hard on an answer to. In the hypothetical.
It's well known that there is a huge influx of middle and east asian Muslims into Europe. Many do not harbor any idea of borrowing into western thoughts, culture or ideals. As Debbie says, it's economics.
But, over the years, and we'll take France for example, they eventually work their way through the democratic process into a significant power base within the country. All the hoop de doop spewed here ignored, France has been a strategic ally for many years. They are also a sophisticated nuclear power. Although not nuke, this could happen in the Netherlands as well.
This could be an interesting dilema for a future US government in terms of both foreign and defense policy, especially if current policies to sidetrack fundamental dominance in the middle east proper gets shoved under the table by any incoming administration.