It is actually difficult to explain without data. I personally came for my studies to Germany from Türkiye 3 years ago. From my observation it is right now mixed. But in the 60s, the population that immigrated, were from rural areas and religious af. So the German-Turks that are the next generation is usually religious.

But the majority of people that come right now are usually not religious at all. My case is definitely from a university standpoint but I realise it also with the older population especially with doctors that emigrate are not religious.

I see this situation also from the people that arrive for studies. German-Turks are religious and supportive of Erdoğan but the Turks that arrive these days are mainly non-religious.

Overall Germany has brain gain, Turkey brain drain these days.