This is significant and I wonder what goes on in Turkey. If it true Erdogan offered an apology to Russia and that he will in fact prosecute the Turkish Citizen that murdered the Russian pilot , there has been a sea of change inside of Turkey and this has implications for the EU as well.
Now added to this are the ripple effects of the BREXIT vote. One reason (among many) that many in Britain voted for exit was so that the UK could once again control its borders and immigration. Other European states are alarmed that having Turkey in the EU would allow the free flow of Turks into Western Europe.
Those same European nations are also dealing with a rise of sentiment among the people themselves that the Russian sanctions unwarranted, that Russia does not pose a Military threat to West Europe and that the future of Western Europe is not with the USA but with closer links to Russia and China.
The Political leaders in the EU may all be toeing the line here as they claim they act in unison to subdue an aggressive Russia, but that same sentiment is not reflected by the people. With a number of nations now considering a referendum as to whether they will remain inside the EU ( and by extension NATO and the Anti-Russian bloc) , along with austerity and an ever weakening economy ,they might well fear a huge backlash from the voter .
These are very tumultous times and many countries are seeking to shore up their Diplomatic positions with respect to other nations before the shit hits the fan,