Re: "Of course you realize, this means war"
That document says what Russia claims to have, and it suits the US to accept the claim in that context.
If you think a Cold War ICBM and MIRVs has any chance of getting to target against modern missile defences, you haven't actually looked at the developments. Really, there is zero chance of even a single warhead making it to target by that route.
There is some chance of a tactical warhead making it as far as Warsaw, if launched from the Belarussian border, but that's assuming saturation with short range missiles and getting lucky. Anything that has a flight time of more than a few hundred seconds simply has no survivability.