The response from all the different Turkish institutions, ranging from the airline involved, the Turkish pilot union , the Turkish media, plus individual participants on this forum is very worrying. It seems to be more important not to be blamed in any way for this tragedy, than learning any lessons. There are a number of very reputable investigation bureau’s involved, they will do their work with impartiality and in a year’s time issue their final report.
The stance of the Turkish authorities so far make me fear an outcome similar to the Egypt Air 990 (B767 crash of Nantucket). Whereby the Egyptians never signed off on the final report that the NTSB issued, because of all sorts of national sensitivities.
The fast majority of writers in this thread are just armchair quarterbacks, with too much time on their hands. For the professionals the lessons will soon brought to our attention. For the rest it is just speculation based on rumour, innuendo and a fantastic lack of knowledge by many.