About "preaching to the choir", you got me wrong. To me this has nothing to do with a meaning like "stop preaching to me", only "you are explaining this to someone who already agrees".
About what to do, psychology is not my field. Mathias Desmet suggests the mind is like a piece of iron, which has been forged into shape by fear, and that this is quite stable.
You can only change it with another big fear, like in this case the fear of totalitarianism. Maybe I have botched this a bit, it may be better to find an interview in which he explains
Now IMHO, it is difficult to do that in practice. Your average pro-narrative guy is still in an environment where covid fear abounds, while he stares blank at you about totalitarianism
Many covid lies are still imprinted on him, and he will still think "yea, but people are dying, don't you get it? DYING"
Totalitarianism to him may not sound problematic at all, he never lived under it. And if you go into detail he will be thinking that "this is something that cannot happen here".
I have heard others suggest that under totalitarianism, which we are headed toward, the real nasty stuff happens when there is no more resistance to the narrative.
From this perspective, it is important to keep putting out the message so the resistance is still seen. I assume it's very important to do this in a non-annoying way.
I think it was here on Memo this was posted the other day:
;t=79s ... which talks a bit about how this should be done.