I would say that's a bit of a stretch.
It is true Germany has a long history if immigration, but before modern times that was mostly from eastern and southern Europe, not from other continents [1].
> Except for Turkey
The mass immigration from Turkey started in the 1960s, well into the modern era. There are plenty of Germans still living today who remember the era when Turks were a rarity in Germany.
No doubt there were Turks who settled in Germany, or the countries which would become Germany, well before then, but the mass immigration is very much a modern thing.