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.