hey don't worry! it won;t me that bad. Muslims may import the babies, but US of A is exporting mcdonalds and MTV, so culturally speaking it won't be that bad.
As well, the more wealthy/developed the society is, the more ateistic it becomes, so again, it won't be that bad.
And on other note - depending on the period of human history you could replace the "muslims" with "jews", "communists", and whaetever else you want, and it would be the same.
it is lowly, very subjective and selective propaganda, nothing else.
P.S - show me example of an church turned into mosque - I know only one case, Hagia Sophia in Istanbul. I don't know ANY example of this after WW2 in Western Europe.