@georgeob1,
You mean me, personally? I'm just friendly with some here and a couple more in the county/state (on political level).
Generally, I think, that Germans are doing quite well with Turks.
Ehem - no police is asking them for their papers, by the way.
And out of the roughly 2.8 million Turkish co-citizens in Germany, more than one third has the German nationality .
One of Germany's largest travel agency (they've an own hotel chain as well) is privately run by a German with Turkish roots ("?-ger Tours", "?-GER TÜRK TUR"
I do think, however, George, that you posed an interesting question.
Since the Turks are mainly Muslims - do you consider the illegals in the USA to have a different religious background as well? I mean, as a former Jesuit pupil, you perhaps do know that Mexicans are mainly Catholic?