I’m going to get down voted, but it’s a bit more complicated than that. Granted, in hindsight the “economic binding” strategy was clearly wrong and a bad call, but at the time “we” believed Putin that he will honor agreements and be a trustworthy partner. And that he will honor Russian economy over territorial things, that do not matter at all for the standing of russia - hell, even back then the consensus was that Russia will utterly fail if they try something stupid, because they “needed” the gas money more, than we needed their gas. And while that downfall will take a few more years, it is inevitable. I admit though, I could not have been more wrong about some things…
Nah, we’re not numb. But the fact of the matter is, we can’t change anything and letting him win is not going to work, because what’s the alternative? Being subjugated or attacked at a later state?
Putin should not forget however, that “we”, the EU, also have Nukes and will retaliate, if push comes to shove. Those threats are meaningless either way.