Indeed dave.
The "but he has nukes" is not irrelevant but what you are actually saying is you give in to nuclear blackmail.
The "nuclear blackmail" being partially in the monds of the people giving in.
Putin will not use nuclear weapons unless we back down: that may see counterintuitive, but feed the beast once and he'll come back for more.
Again and again. And the more the threats the more likely things are to escalate.
Show Putin strength and he back down,
It is quite funny in a way to see how the energy blackmail has not worked: Europe is awash with the stuff: the spot price actually feel below zero the other day, LNG container ships are backed in in European ports, and Germany, ironically, basks in summerlike sunshine, Ok, it's only October, but the stocks are there for a harsh winter, should that happen.