Islamisation of Germany

It is somewhat strange that politicians of our country totally neglect the fact, that the islamisation of Germany is a real fact and that there is an agenda of certain groups who try to change the culture of this nation. Sadly, some weird groups use this fact to propagate hatred against foreingers. Nevertheless it is obvious, that there are plans to expand islam in this nation. But Germany has different roots and the christian heritage shoul not be thrown away.