> I understand that this is the opinion of you and others. That doesn't make it the law.
It's not really a question of law. It's more a question of fact ("were these claimed economic harms caused by the statement"), which means its a question for the jury. Which means it's the opinion of the jury that matters.
As far as "the law" on this topic, typically the most relevant thing will be the jury instructions. These will vary from state to state, but let's take a look at Virginia's since those were the first I found online.
I'll highlight again my claim that we're evaluating:
"Courts and jurors are completely fine with finding that the behavior of nutjob B (and C and D and E and F) that are predictable from the defamation are part of the damages associated with the defamation."
Let's look at the 37.100 for Actual Damages from the VA pattern jury instructions: https://www.vacourts.gov/courts/circuit/resources/model_jury...
> ...in determining the amount of damages to
which he is entitled, you may take into consideration all of the circumstances surrounding the statement, the occasion on which it was made and the extent of its publication, the nature and character of the insult, *the probable effect on those who heard the statement*, and its probable and natural effect upon the plaintiff's personal feelings and upon his standing in the community and in
business
I've indicated the key section which directly supports my claim. I'll turn it over to you. Can you find a state's pattern jury instructions that *don't* behave the way I suggest? I'm not familiar with all 50 states defamation laws, but I'll be very surprised if you find a single state that doesn't allow the jury to include the predictable actions of third parties based on the defamation as part of the harms of defamation.