exactly, and threatening this flip side is what actually prevents large scale wars.
The west never should have backed down the way it did beforehand. Some say we've become so weak because of china and russia, but military speaking, we are not. We should send an immediate western threat to show that the behavior is not to be tolerated and can lead to actual war. So far, Putin knows he can do whatever he wants, because he knows there will be no repercussion, but that's the tragedy. If he at least feared it could by a small percentage result in a military involvement of the NATO allies, this would not be possible. Thing is, and it's a dreadful thought imo, but where will Putin stop now that he can freely operate? When the annexion of Krim happened, appeasement was our reaction. Now that the ukraine is getting invaded, we don't react either. Maybe it is time to see historical parallels to other cases of appeasement politics and where it led to. Because he won't stop there. It might just mark the beginning of further russian expansion and while it might be true that the west is on decline, it's still strong and a sleeping giant.
I say: send the reaction, threaten a total escalation and it won't come to that. It's the thought that it might come to that, that could prevent this.