Syria in and of itself has no importance for the US. It is neither a major market which needs to be protected nor is it a source of raw materials for western economies. For Russia, Syria is important politically as it is the only outpost in the Middle East where Russia is considered important.Yet it outdone the US in Syria
The Russians and the Turks will eventually aggravate one another because the interests of both are different. OK. Turkey has been drifting away from NATO for some years (although they are never going to leave and lose the nuke umbrella), and the US has been less and less interested in the M.E. for several reasons, both economic and political. If the Russians want to get further into the middle of that mess, that is their business.