In Germany according to what what the press uses to report, the main problem in this regard seems to be part of the Turkish women being kept at home, in a traditional role, not learning to speak German i.e. not being able to communicate with the society at large.
Especially for wives who have come from the old country via arranged marriage - they are obviously very much dependent on their husband.
This is not only bad for the wives but also for their children. The German school system assumes a lot of learning being done in the family. A child whose mother cannot help with the homework, who doesn’t talk German in the family and whose parents don’t come to parents’ evenings is pretty much doomed educationally.
My picture on the situation of teenaged Turkish girls:
- Of independent-minded girls being sexually terrorized by their male contemporaries, as described in the OP, I have not read in the press.
- But: there is the occasional honor killing, by male relatives.
- According to some anecdotal press reports, Turkish second/third generation immigrant girls seem to do better at school/have more aspirations for a better formal education than their brothers. Possibly because they see that traditional roles are a bad deal for women and education is their chance to escape.
With Germany, I think the main mistake was to subscribe to the illusion, from the 1950s well into the 1990s, that the Gastarbeiter immigrants would come, work, then return with their earnings to their families in their country of origin, mainly Turkey. Not only did we ignore that they settled with their families, immigrated de facto and to a large extent even stayed for retirement and burial, but we also encouraged the immigrants in the self-deception that they’d only stay until they had built a nice new house in their home village. Result: We did not engage them as part of our own society, as we ought to have done from the start.
There is little that can be done as govermental policy, IMO. My personal vision of society is that nobody who is not mentally handicapped should be allowed not to be able to speak the language of the country he/she lives in, or be allowed to have sub-par formal education. But that’s too coercive to work in a liberal democracy.
The lowering of barriers to naturalization a few years ago should help in getting the immigrants to be part of our society. Two thirds of resident aliens are now entitled to naturalization on the basis of time of residence alone - they just need apply. Unfortunately not as many apply as has been hoped.
The most important thing IMO is the attidude of individual people. We need to become aware that we are several ethnicities but one nation, and that other ethnicities’ business is our business.