A Contrarian Clarification of "Free Speech"

A social media company has the right to decline publishing my opinion, but the government's ability to restrict what the social media company publishes is restricted by the First Amendment.

We all know what "free speech" means: it's our right to say whatever we want, whenever we want, wherever we want, as long as we're not libeling someone. Well, actually, no, that's not what "free speech" means. Here's the First Amendment to the Constitution of the United States:

Congress shall make no law respecting an establishment of religion, or prohib…