What do you think started, and kept WWI going, narrative. Every party believed or was sold that they could win this thing if they just kept climbing the escalation ladder. With the result that an entire generation of boys and men was gone for basically nothing.
What if I put a couple of my friends on the border of your house, and explicitly said, hey if you try to do X Y or Z then I might have to kill you.
For a start I would not do X, Y and Z, this is the whole idea of realism, accept the world as is. Threats work, I'm sorry. If your response is to call the police, there is no police in the world of international politics, you have to play the hand you're dealt.
And in the case of Ukraine this was sadly a very bad hand, that is why I don't blame Ukraine for much. You could of course blame Ukraine for being lured by the power of the US, and that they could thus safely ignore dire warnings from Russia. But as they say, with great power comes great responsibility, so I choose to put the blame at the hands of Russia and the US.
You seem to conflate questioning a narrative with banning a narrative, I have the intent nor the means. I value being able to have an open discussion on topics as important as war, especially based on substance rather than resorting to personal insults and such.