> Just let yourself think about what his counterparts in US were saying
Timothy Snyder for example? He's saying that Ukraine should be admited to NATO and EU, and that Russia needs to lose this war. What's wrong with that?
> Only now there is more people who start saying clearly that the war is not going to stop
All wars stop.
> Ukraine is going to be completely destroyed in the process
Already is. If you let Russia settle for peace on their conditions - they will rebuild and invade Ukraine again. Like they already did 2 times. So it's better to deal with that now than to give them more time to harm Ukraine.
> "The Art of Diplomacy" by Francois de Callieres, about 17th century european politics, which is talking about how to do international relations
There were no nukes, NATO, EU, UN. No relevance whatsoever.