Dirk, I think that is where Germany benefits from their Muslims being Turks
Well the "Turkish" population of Germany is divided into two groups that don't necessarily interact much. Ethnic Turks and Turkish Kurds, I don't know what the percentage of both are but IINM the great majority of "Turkish" criminals in Germany are Kurds. I think a majority of fast food places are run by Kurds too, but most of the ones I've been to are.
In terms of being able to find and keep jobs, then in Europe the percentages seem to be
Turks - best
Turkish-Kurds, Asian Arabs (usually from the Levant - sensu largo)
North African Arabs - worst
The Asian Arabs also are most likely to have professional qualifications so Syrians and Iraqis in Poland more liable to be doctors, academics or work in construction management.