I believe in the sincerity and reason of those that believe that the institutions of liberty are in danger.

Promoting the destruction of liberty should not be protected speech, just as hate speech is not protected speech.

"[Their] freedom should be restricted only when the tolerant sincerely and with reason believe that their own security and that of the institutions of liberty are in danger." [1]

[1]:https://en.wikipedia.org/wiki/Paradox_of_tolerance