Interesting to know. I moved here in '82 - when the Greens were morphing from an extremist fringe group to a parliamentary force (of course, they're still fringey in my mind).
The assumption then was that the Turks were here (in W. Germany) just as a temporary workforce. Countless polls pointed out that most Turks intended to return to their homeland for retirement - well, we know now what to make of that.
Regards,
I remember Petra Kelly and Gert Bastian.