I translated the name, try searching for “Verein Türkischer Dönerhersteller in Europa”.
But really the name is self explanatory.
The dish “Döner Kebab” was invented in Germany by Turkish migrants and became very popular. Now a group from Turkey is trying to enforce their definitions and regulations of what a Döner Kebab should be on our dish.
This has nothing to do with German people or government denying power to German-Turks. This is German Turks fighting back against Turkish-Turks trying to interfere with their buisnes.
Like image some activists in Italy would demand that the US government ban the word pizza unless it’s refering to italian-style pizza.