Free expression in all forms is fundamental in democratic societies. Without it, all other freedoms are at risk.
Included are free speech, a free press, freedom of thought, culture, and intellectual inquiry. It also includes the right to challenge government authority peacefully, especially in times of war and cases of injustice, lawlessness, official incompetence, and abusive government behavior.
Denying it risks tyranny. Voltaire defended it, saying "I may disapprove of what you say, but I will defend to the death your right to say it."
Howard Zinn called dissent "the highest form of patriotism." It includes the right to speak and write freely, assemble, protest publicly, and associate with anyone for any reason lawfully.
Democracy depends on it. Bill of Rights freedoms affirm it. Nonetheless, US history is strewn with abusive laws. The 1798 Sedition Act criminalized publishing "false, scandalous and malicious writing" against President John Adams or Congress, but allowed it against Vice President Thomas Jefferson.