Russia is already bordered by multiple NATO countries. You should not be parroting Kremlin talking points at this time.
And they aren't happy about it. At the time, they weren't in a position to do much about it though.
For that to happen they would have to first turn into a tyranical shithole like Russia where an impotent old man can do as he pleases.
They don't start with nukes. They first murder journalists, bomb their own appartments, poison opposition leaders.
They only country in the world which is remotely close to doing a first strike is Russia, and perhaps North Korea.