would you feel radically different if they were suing multiple non-profit/charitable sites that hosted discussion forums and provided communication platforms where this stuff took place?
Yes. Anything that a person would be able to say, a group of people should be allowed to get together to say. The much-maligned "Corporate Personhood" is a founding principal of pretty much all of US law, in that it defines a corporation as simply being a proxy for all of it's members.
There are plenty of places where Corporations should currently be being prosecuted for fraud and false advertising. These are places where the people behind them would and should be just as liable for those things (and judges should pierce the corporate veil to prosecute those responsible). This is not those times.
I read that as the free speech of others, not the "speech" of the companies.
The whole "companies are people" is nonsense. They are simply machines like any other human invention, and can't reasonably be held to have objectives or speech of their own any more than an automobile can.