About the Russian Sanctions

Russian sanctions against Western countries on one hand means as Russia's readiness to continue tensions, even if by ending the crisis in Ukraine and on the other hand it can be identified as Russia's last effort to bring Western powers back to the negotiation channel with Moscow.
But two points are so important here. Firstly, Syria, or according to the British friends "Syria's permission" is not negotiable. Therefore, it is necessary for Moscow to know that what has been achieved in Syria will not be returned to Russia. Secondly, it is important to know that Russia's carrot is certainly tempting, especially on Gazprom. So if the regime of tensions tends to continue in order to realize the great aim of weakening Russia, it is needful to ensure the interests of the Western powers.
Also, powers such as the UK and Japan, both of whom are unsure about continuing tensions with Russia, before continuing conflicts with the country it is necessary to raise their true desires and expectations. Because the regime of tensions that will have a function like an order in case of continuing and will be successful if all the countries allied with Washington move in concert with each other.  
It is clear that the tensions' regime should not lead to expensive opportunities such as establishing a secret channel with Russia for friends of Washington; otherwise, the regime of tensions would fail in achieving its primary goal.