Earlier quoted context omitted.
First amendment is protection from the government, not by the government. It wasn't the government that blocked the speech so it wasn't a first amendment issue
It is protection by the state. It is how the state is constituted. It's what the state means and offers. It's what the state is for and what, in principle, the state does. If the state doesn't in fact do these things then you have a different state and the constitution is just a piece of paper.
It absolutely is not. In fact it is a restriction on the state.
The rights enumerated in the Bill of Rights are inherent. They are not derived from the government. We have them by nature of existing. The Bill of Rights prohibits the government from infringing on these inherent rights.