The entire car industry around Stuttgart (Mercedes Benz, Porsche, etc.) was basically build on on shoulders of Turkish immigrants. They are a huge part of the workforce there.

Lots of them are very wealthy and basically DIN Germans by now.

This page is inaccurate and forgets to mention the one of the largest immigration waves - repatriation of Germans from Eastern European countries. A lot of people born in Poland, Czechia, Ukraine, Russia or Kazakhstan are ethnic Germans that were either forced to move (Eastern Prussia) or were invited to come in admission of what they suffered as a result of Nazi invasion to those countries.

19.8% of the German population are immigrants. The US is only 15% and we act like we’re being invaded. The UK sits at 19%.

When jobs are scarce and housing unaffordable, no wonder people question these things.

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The Russians were successful in seeding Germany. During the USSR, they purposefully sent Russians to East Berlin knowing that long term no matter what happens they will have a foot hold. This is their strategy for over a century, occupy land that is not yours and fill it with your slaves who will always be servants of your Empire of Evil for ever. It really is too bad that many of the Eastern Block countries did not implement forced repatriation of Russians back to Russia after the fall of the USSR.