You underestimate the value and strategic purpose of second strike. https://en.wikipedia.org/wiki/Second_strike
By definition fired after you've already been hit with nuclear weapons.
Second strike is the deterrent measure to nuclear war, so why would improved second strike capability be a source of fear?
By definition fired after you've already been hit with nuclear weapons.
Second strike is the deterrent measure to nuclear war, so why would improved second strike capability be a source of fear?