In one or two generations, our money won't mean much to them either as they will have elected to join other Islamic regimes. Just do the math based on the average European nation only reproducing at 1.5 children for each couple versus their 10-20% now minority Muslim populations reproducing at 4-5 children per couple.
Spain, France, Germany, Italy, Holland and THE UK will have no choice but to become Muslim based on democracy and the ballot box. Churches will be turned into mosques; the free press will be history as will our Western take on modern culture.