I don't support "absolutely" free speech either. A line has to be drawn. I think it should be drawn as narrow as possible.
If someone promotes a campaign to hunt down an individual and murder him/her; certainly I wouldn't blame anyone for taking that content down. I think we already have a good tool for where the line goes and that is the law. E.g. you can't recruit and plan for terrorism and you can't spread child pornography among other horrible things.
This is something else. This is a situation where three major companies use vague paragraphs in their terms and conditions to target a specific platform.
What's next? If Parler self-hosts, will demands come to ISPs to shut them down? Where does it end.