If you actually read their article, it seems they are saying that 8chan WASNT defensible to them and was a mistake for them to do so.
their opinion is that it is (almost always?) ethically wrong for them to withhold security products. for the two websites i mentioned, nobody is stopping them from providing services. for a third, they could lobby to fix fosta and/or not transit switter traffic in the us.
I stated this: "but I don't see how KF is defensible whilst 8chan et al aren't"
This meant: I don't understand how they can invoke the removal of 8chan and a neo-Nazi site, yet retain KF.