MINe 109 wrote:

The phrase is a useful idiom describing a certain style of argument
without regard to content, so I wondered if there were an equivalent
idiom in French.

Surely there is...
Middius' way to ridiculously protect himself with his derisive killfile
is grotesque and pathetic so for me Middius is a "half-man".

I don't care if what I write answers or not answers to Middius posts
because Middius doesn't care if I understand what he uses to write.

This is what we call in France a "dialogue de sourds".
In the end it's not a problem because I don't care about Middius'
respect in the same way he doesn't care about mine.