We have gone far further than any of those.
Imagine if the Soviet Union gave Vietnam missiles and explicit permission to strike US cities during the war.
That is an entirely different scale of involvement that has never been tested against a large power before.
A better hypothetical would be if we invaded Mexico and the Russians gave them missiles to defend themselves.
Huh, I remember something almost exactly like this happening 61 years ago that was probably the closest the world has been to nuclear war.
What is the difference? In both cases one side is giving missiles for the explicit purpose of striking the rivals cities.
Distance is pointless when that capability only exists due to the missiles provided.
WW3 is a real threat. Imagine if Russian responds by blowing up the trains the missiles are on in Poland? Or striking a Western city in turn?
We are relying on the restraint of gangster led Russia to avoid nuclear war here ffs.
