“I don’t want to be seen agreeing with someone who combats obvious bad faith arguments with sarcasm - please think of me as being better than that, even though we would end up in a pissing contest about nuance or a digression away from the main point”.

Bit of a mouthful though.

Yes, it is called tone policing.

I was under the impression that tone policing was using to attack the tone because you disagreed with the argument