If Putin uses nukes in Ukraine, the entire world would shut him down. Russia would become a pariah. No imports, no exports. No trade at all. A complete cessation of their ability to act as a nation state.
We wouldn’t have to fire a shot.
No one would want to come across as “supporting” a nuclear attack.
That is so untrue. If it comes to nukes we are all going to die. After Japan.
But remember Putin only Saud he would use them in defense.
The west loves talking about using them.