Goes without saying nobody wants WW3/Nuclear warfare. On some of the points above though saying Ukraine are expendable is shocking to read, but also goes beyond that. You can't just allow Putin to do as he pleases because he has nuclear weapons and "might" use them. What if he announced drop all sanctions or I will nuke you for example. I'm glad I don't have to make these decisions but if NATO decided to help Ukraine with boots on the ground I'd understand and support. What happens after that, well so be it. Personally I don't think it would bring nuclear war. Even if he himself wanted that.