BBC NEWS | Americas | US teens 'reject' key freedoms
An interesting discrepency in terms of the generation gap. Assuming that students (high school) and teachers are representative of their generations, then the difference in terms of support for the publication of unpopular views is pretty stark, 83% v 97%.
My preferred theory right now is that the protrayal of civil rights in larger society have been rather different. Without living through whether actively or vicariously, the civil rights movement or the Rodney King era, and having in your life time simply the menace of 9/11, might put a pall on civil liberties in the context of national security.