At the current birth, death and ‘immigration’ rates there won’t be enough people speaking German in 200 years to sustain the language.
Your neighbors need to wake up - and quickly...
If political correctness forbids the open support of the nation as a nation state and permits only support of human values generally crystallized in organizations like the European Union, the United Nations, the world court, the European Court of human rights etc., the nationstate is going to wither.
The Germans also concluded individually that their personal destiny does not lie in extended families. This is a choice that comes with feminism and with the pill. As a nation Germany is willing to accept foreign workers, even Muslim foreign workers who are difficult if not impossible to assimilate, in order to keep the economic engine going. Japan, in many ways similar to Germany, has embarked in the opposite direction. I happen to think in the long run Japan is right. The quality of life of the nation, often expressed as the economic vitality of the nation, will in the future not be dependent on the number of people but on the productive power of the nation created by technology. It is not how many people on welfare a nation has but how many robots it has producing wealth.
The question is, how do you distribute that wealth produced by machines rather than people without succumbing to socialist solutions of redistribution?