It's a bad faith argument, yet it's everywhere. I'd think HN would be better than that, yet here we are, having the same fight every time free speech is the topic.
Also note that the parent mentioned "government action" whereas the GP is referring to a business taking action. The distinction is incredibly important, yet so many free-speech purists respond to corporate action as if it was a government action.
(cue the desperate, too-cute-by-half arguments "but are they REALLY inciting violence?")