Islam is the equivalent of Communism in the spiritual sphere.
Where the good people of a society don't fulfill their role, the primitive hordes take over. Such a thing happened in the last century in Eastern Europe with the rise of Communism.
Now we will see the rise of Islam in the rich nations, which became self-centered and void of real values.
Low pressure attracts high pressure to balance things... It's also just fair, isn't it?