When the leftists guillotine someone, this will become a more persuasive argument.

Ironically

https://www.vanityfair.com/style/2020/08/jeff-bezos-guilloti...

Dispite my disagreeing with you and feeling pretty shafted by the removal of Parler, don't take it personally - you're an open source contributer who has earned my respect.

Isn't the whole point of this "deplatforming" to stop incitement?

Yes, after concrete evidence that the incitement is sincere, or being materially interpreted as sincere.

(For the record: I think the guillotine imagery is as offensive as the Pinochet helicopter stuff, which is to say, extraordinarily offensive, and I think less of anyone who uses it. That's easy for me to say though, because I'm also not a leftist.).

Did they name people, places, or times? A key factor in free speech legal cases is how credibly threatening something is — someone telling a friend “I’m going to strangle you!” after they get rickrolled is clearly not but someone saying “On <date>, we’re going to <place> to kill <politician>” is enough that the Secret Service might want to talk with you.

Another factor is the climate: nobody is using guillotines anywhere now but mass shootings are sadly common.