Comment by kube-system

It's a combination of 1 and 2 for the most part.

There's a lot of nuance lost when the Bill of Rights is being taught in US grade schools. Most kids read each of the amendments but then are given a simplified interpretation. "The first amendment guarantees a right to free speech" would have been correct enough for a test answer when I was in school, although it loses enough nuance to frequently be incorrect, because people often presume that equates to "I can say what I want without consequence and the government will protect my ability to do it", when it more accurately should probably be taught as "the government has a limited ability to meddle in other's speech"

The net effect is both that people misunderstand the 1st amendment, and they also believe that what they thought it meant is an important value.