If you don't stand up to dictators when they are using state military power to conduct terrorist attacks on women and children, you've already lost "western civilization."
In addition, how can you pretend to be a protector and promoter of democracy if you aren't willing to stand up and prevent the invasion, subjugation and colonization of a sovereign democracy, which is what Russia is attempting to do to Ukraine?
You sound like a modern day Neville Chamberlin. Better to have the fight now, especially while Russia is exposed as a military fraud, than to allow them to "win." Because Putin will not stop at one bite of the apple.
I'm currently somewhat drunk, and I don't frequently comment in these threads, but there is a factor you fail to mention here: the possibility of nuclear war.
This is not the same situation Chamberlin faced. If you want to make that comparison, the situation in Iraq prior to the US invading in 2003 would be a better comparison.
Don't get me wrong, I think the Russians should be defeated in Ukraine, but this is a much touchier situation than a simple "dictator bad, must defeat" scenario.