Here is a good article that discusses Russia's regional concerns.
It’s no secret that President Vladimir Putin, taking pages from the playbooks of Russian leaders of yore, is trying to secure strategic depth. Much of that depth naturally lies in Eastern Europe and the Caucasus, which have been contested since at least the 16th century as Russia began to reclaim lands of Kievan Rus. Stalin continued to incorporate these territories before and after World War II, and in 1991, when the Soviet Union collapsed, they became vast borderlands from the Baltics to Central Asia comprising newly independent states.
Russia’s latest attempts to recreate its buffer zone have created an arc of instability from Eastern Europe to the South Caucasus. Many of these states were already unstable, of course, and Russian revanchism has only made things worse. The question now is whether, when and how Russia will continue collecting territory.
Existing Instability
ΜOΛΩΝ ΛΑΒΕ
I think it's plain that Russia only has one concern - the fact that NATO keeps expanding East towards Russia , which goes directly against the agreement made between Gorbachev and Reagan , when the Soviet Union broke up . The real problem here is America's integrity , or lack of it.........these kind of stories are just propaganda , and only do more harm.