So let us now examine the Russian reaction to Empire’s stance.
First, the Russians want to make darn sure that the Americans do not give in into the illusion that a full-scale war in Europe would be like WWII which saw the US homeland only suffer a few, tiny, almost symbolic, attacks by the enemy. Since a full scale war in Europe would threaten the very existence of the Russian state and nation, the Russians are now taking measures to make darn sure that, should that happen, the US would pay an immense price for such an attack.
Second, the Russians are now evidently assuming that a conventional threat from the West might materialize in the foreseeable future. They are therefore taking the measures needed to counter that conventional threat.
Third, since the USA appears to be dead set into deploying an anti-ballistic missile system not only in Europe, but also in the Far East, the Russians are taking the measures to both defeat and bypass this system.
The Russian effort is a vast and a complex one, and it covers almost every aspect of Russian force planning, but there are four examples which, I think, best illustrate the Russian determination not to allow a 22 June 1941 to happen again: