You're right, and that's the dilemma we are facing. No political philosopher, or no political philosopher of any substance, would say that a constitution is also a document by which a people will commit suicide in the sense of allowing our liberal value of tolerance to go to the extent that we empower the intolerant to destroy our tolerant society. This is the dilemma of the small-l liberal society that we are faced with.
On February 3rd, 2015. See this statement in context.