If Turks in Germany decide to take all their assets from Germany because of anti-turkishness in Germany, Germany would collapse. Turks are well organised and own businesses.
You are so wrong. What do you mean, "assimilate"? I don't believe any culture or ethnos can survive a continuous, long process of assimilation, passive or otherwise. In the end, say the third quarter of this century, it will be the indigenous European Christians who will be absorbed into an ethnic melting pot occasioned by their refusal to breed and failure to fight for what their ancestors built and defended. As long as laws are obeyed and taxes are paid multiculturalism is fine.