Or, you know, instead of re-litigating the Nuremberg Trials with every single idiot on the planet, use your agency not to participate in their propaganda efforts.
Im assuming you are ok with shutting down twitter, facebook, and other social media platforms for allowing far left and extreme islamic terrorist ideologies?
Did twitter suggest that it wanted to host terrorist material due to an uncompromising commitment to free speech? I assume if you gave them a magic wand to wave that would remove all terrorist material then twitter would wave it. Could Gab say the same?
Not all speech is equal in building fear/stress/intimidation. Bomb/death/dismemberment threats are very different from the content of my comment.
While most of us feel like we can shrug off threats and "words can't hurt me", that isn't actually true [1], it is possible for a campaign of terrorism (in terms of "intimidation [through fear] for a political aim") to be enacted solely in words.
Freedom of speech is not freedom from consequences, and words have consequences in the way the brain processes them, even if we want to keep arguing whether or not it is valid for speech to also warrant consequences such as a private company (domain registrar) refusing to do business with another private company.
[1] It is something of a comfortable lie that we tell school children to avoid what actual science/psychology tells us is stressful/harmful to humans.