There
will be nuclear war if UN continues to do nothing, because Russians and Putin especially understand only strength. Given the events in Yugoslavia, they could be doing something. This anti-confrontation stance you speak of is obviously not working - we knew that at the very least since 2008 (Russian war in Georgia) and yet nothing was done - actually people appeased Russia even more instead of working to prevent further escalation, and not even 2014 stopped it.
Russian TV today: https://i.redd.it/q2c22clpalw81.jpg