I have no detail knowledge of the fallout radius or radioactive decay, I would assume an ICBM hit would render the valley and Manhattan unliveable, but I haven't been in both places for more than five years so I might be wrong.
The times make the people.
Whenever I see someone do this, I generally stop talking immediately, but I am sticking up for GP on this one.
The comment you are replying to in no way made a statement about what is or isn't awful. Simply a comment about the size of various things.
Don’t get me wrong, I certainly hope the USA strategic and tactical defences are capable of facing even the worst case estimates; but, as a civilian, NK nukes and ICBMs never put me off visiting the USA and played no part in my ultimate decision to not bother trying to move to the Bay for work.