More than just that but most directly? Yes.

Freedom of assembly!

Yes. But also, the whole project of freedom and liberty that the constitution is meant set up and guarantee. The idea being that we are not ruled but rule ourselves through and according to law. Key to that is being able to criticize your government and demonstrate your political sentiments.

Oh I agree! I think most republicans have no idea about the const. that our fore fathers made for us, I was just for purpose of defining protest as freedom is the first amendment. It seems that nowadays like "Christians" who skip Jesus' words go to the old testament, they dont know the constitution