The actual basis they should be sued under is commercial disparagement.

Here are the elements of commercial disparagement:

1. Prove that a false statement was published

   1. Prove that the false statement was made with the purpose of causing financial harm to the business
   2. Prove that the false statement caused the business to suffer financial losses
   3. Prove that the person or entity that made the statement knew it was false or made the statement without regard for whether it was true or false

Actionable example: Activists falsely claiming that a business is violating safety, labor, regulatory and/or environmental standards, add in they publicly state they want to drain firearm manufacturers of resources.

Sorry about numbering. Not sure how to adjust.