Not being an Intelligence annalyst by occupation it seems to me that the Russians may be planning a preemptive strike against the U.S.Otherwise I can’t see why Russia would build a multilayer defence thats Not needed.
With Obama destroying our military by the day we sure are No threat to Russia now and never have been.
The only other reason I see to beef up those missile defences is China’s growing military strength is making Russia a little uncomfortable.
Russia is only building these to confront the US and NATO.