Still only takes a handful of them to have extremist views....

This is taken from The Gatestone Institute On August 31st 2015:

Germany's Muslim Demographic Revolution

Of the 800,000 migrants and refugees arriving in Germany in 2015, at least 80% (or 640,000) are Muslim, according to a recent estimate by the Central Council of Muslims in Germany (Zentralrat der Muslime in Deutschland, ZMD), a Muslim umbrella group based in Cologne. This estimate is not in dispute.

In addition to the newcomers, the natural rate of population increase of the Muslim community already living in Germany is approximately 1.6% per year (or 77,000), according to data extrapolated from a recent Pew Research Center study on the growth of the Muslim population in Europe.

Based on Pew projections, the Muslim population of Germany reached an estimated 5,068,000 by the end of 2014. The 640,000 Muslim migrants arriving in Germany in 2015, combined with the 77,000 natural increase, indicates that the Muslim population of Germany will jump by 717,000, to reach an estimated 5,785,000 by the end of 2015. This would leave Germany with the highest Muslim population in Western Europe.

By way of comparison, the surge in Germany's Muslim population would be equivalent to the Muslim population of the United States increasing by 3 million in just one year.