Gents,
Well, evidently Putin and Erdogan are sharing the post-Assad Syria now. Ottonams will possess north, easying if not eliminating Kurds threat, Putin will get shore. Partly due to the needs for naval bases, as Russian Maritime Doctrine claims for constant naval presence in Med, and bases in Syria will be much more useful than that poor Sevastopol in Crimea. But mainly Putin wants Syrian seashore to be able to block any attempts to arrange gas/oil tube transport to Europe via all possible "southern streams" or alike, just to exclude any competition to northern pipelines via land and Baltic bottom which are totally controlled by Russians. Pure business, nothing personal, the same you an American did to ensure gas and crude oil markets' behaviour, and this is right. Repeat, this is right. No one should blame any nation for activity to grow wealth and protect it. Other question is that "any nation" has to do that very careful and politely. I was, is and always will be against Russian invasion in Crimea, even if it was inevitable, not in that time and not by those means. Possessing 2,5 million roughly "own" people on peninsula, Putin got 30+ million enemies in a kind of all the rest of Ukranian citizens. I think this is a mistake, as this MOOTW action weren't based on economy needs. But Syria is another picture. Putin and his throne-crowd are extremely rigid in intention to press ISIS to its snakepit and execute there, and evidently Erdogan has been pressed to accept this, too. Otherwise 9/11 or alike could occur again, which is unacceptable for both USA and Russia.