Ummmmm
Russia will cease to exist as a nationality if it starts a nuclear war.
It depends. Sure, that there is a risk of that, but they consider that the risks of NATO-occupied Ukraine are much more serious. Therefore, if there is a choice - "To start a nuclear war against the USA" or "To allow NATO occupy Ukraine", the first option is much more safe for them.
The targeting in Russian missiles is not good enough to hit where most of the USA's missiles are stashed, ready to launch.
Actually, it wasn't absolutely true even forty years ago, and now, with all those electronic things it's not true at all. In fact, Russian Sineva and Bulava warheads never missed their targeting points for more than 7 meters (21 feet) and it's more than enough for a 100 kt warhead. In "realistic" scenarios they usually count it as a 90% single-hit probability, which, with two warheads for a silo, means that there will be only four survived Minutemen, all of them without immediate capability to launch.
Not to mention the ABM defenses we already have in place that Russia has no concept of.
en.wikipedia.org
en.wikipedia.org
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There are at least 68 active launchers of short-range
53T6 endoatmospheric interceptor nuclear armed missiles, 12 or 16 missiles each, deployed at five launch sites. These are tested roughly annually at the Sary Shagan test site.
[15] In addition, 16 retired launchers of long-range
51T6 exoatmospheric interceptor nuclear armed missiles, 8 missiles each, are located at two launch sites.
[4]
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(16*8 + 68*12)/2 = (128+816)/2 = at least 472 warheads incoming not simultaneously or 42-84 warheads incoming simultaneously.
Which means, that a coordination of a possible retaliation strike demands time (likely hours, may be even days), which time the Russians (and, of course, Americans) will use for evacuation and sheltering.
What is even more important, there is a problem of the third Russian strike. If the USA attack half-empty, half-sheltered Moscow with all remaining warheads, FUBAR it, and kill, say, 500.000 Russians, the Russians will attack American cities, too. In such a situation (post-attack blackmail) there are pretty good chances that the USA could agree at almost any peace terms (except unconditional surrender, of course).
They certainly don't have them . Sure they have radio free zones....but that doesn't help when the missile is using an altimeter to detonate....the radio free zones only stop the missiles from self destruct being effective if we want to stop the attack.
You have a LOT of goofy ideas.
Non of those ideas are mine.